diff --git a/applications/test/hashedWordList/Make/files b/applications/test/hashedWordList/Make/files
new file mode 100644
index 0000000000..e92564415e
--- /dev/null
+++ b/applications/test/hashedWordList/Make/files
@@ -0,0 +1,3 @@
+Test-hashedWordList.C
+
+EXE = $(FOAM_USER_APPBIN)/Test-hashedWordList
diff --git a/applications/test/hashedWordList/Make/options b/applications/test/hashedWordList/Make/options
new file mode 100644
index 0000000000..6a9e9810b3
--- /dev/null
+++ b/applications/test/hashedWordList/Make/options
@@ -0,0 +1,2 @@
+/* EXE_INC = -I$(LIB_SRC)/cfdTools/include */
+/* EXE_LIBS = -lfiniteVolume */
diff --git a/applications/test/hashedWordList/Test-hashedWordList.C b/applications/test/hashedWordList/Test-hashedWordList.C
new file mode 100644
index 0000000000..e7126e6a8e
--- /dev/null
+++ b/applications/test/hashedWordList/Test-hashedWordList.C
@@ -0,0 +1,181 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Description
+
+\*---------------------------------------------------------------------------*/
+
+#include "IOstreams.H"
+#include "ITstream.H"
+#include "FlatOutput.H"
+#include "hashedWordList.H"
+
+using namespace Foam;
+
+Ostream& printInfo(const hashedWordList& list, bool withAddr=false)
+{
+    Info<< flatOutput(list) << nl << list.lookup() << nl;
+    if (withAddr)
+    {
+        Info<< "addr=" << long(list.cdata()) << nl;
+    }
+
+    return Info;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+// Main program:
+
+int main(int argc, char *argv[])
+{
+    Info<< "Test hashedWordList" << nl;
+
+    hashedWordList list1
+    {
+        "this",
+        "is",
+        "a",
+        "list",
+        "of",
+        "words",
+    };
+
+    Info<<nl << "From initializer_list" << nl;
+    printInfo(list1, true);
+
+    list1.sort();
+
+    Info<<nl << "sorted" << nl;
+    printInfo(list1, true);
+
+    // Copy construct
+    hashedWordList list2(list1);
+
+    Info<<nl << "Copy construct" << nl;
+    Info<<"list1: ";
+    printInfo(list1, true);
+    Info<<"list2: ";
+    printInfo(list2, true);
+
+    // Move construct
+    hashedWordList list3(std::move(list1));
+
+    Info<<nl << "Move construct" << nl;
+    Info<<"list1: ";
+    printInfo(list1, true);
+    Info<<"list3: ";
+    printInfo(list3, true);
+
+    // Move assign
+    list1 = std::move(list3);
+
+    Info<<nl << "Move assign" << nl;
+    Info<<"list1: ";
+    printInfo(list1, true);
+    Info<<"list3: ";
+    printInfo(list3, true);
+
+    list1.swap(list3);
+    Info<<nl << "Swap" << nl;
+    Info<<"list1: ";
+    printInfo(list1, true);
+    Info<<"list3: ";
+    printInfo(list3, true);
+
+    wordList wlist1
+    {
+        "plain", "list", "with", "some", "with", "list", "duplicates"
+    };
+
+
+    // Copy construct unique
+    hashedWordList list4(wlist1, true);
+
+    Info<<nl << "Copy construct unique" << nl;
+    Info<<"words: " << flatOutput(wlist1) << nl;
+    Info<<"list4: ";
+    printInfo(list4, false);
+
+    // Move construct unique
+    hashedWordList list5(std::move(wlist1), true);
+
+    Info<<nl << "Move construct unique" << nl;
+    Info<<"words: " << flatOutput(wlist1) << nl;
+    Info<<"list5: ";
+    printInfo(list5, false);
+
+    // Move back. Leaves lookup() with some rubbish, but clean that later
+    wlist1 = std::move(list5);
+
+    Info<<nl << "Move to wordList" << nl;
+    Info<<"words: " << flatOutput(wlist1) << nl;
+    Info<<"list5: ";
+    printInfo(list5, false);
+
+    // Move back. Leaves lookup() with some rubbish, but clean that later
+    list5 = std::move(wlist1);
+
+    Info<<nl << "Moved from wordList" << nl;
+    Info<<"words: " << flatOutput(wlist1) << nl;
+    Info<<"list5: ";
+    printInfo(list5, false);
+
+
+    // Test access:
+
+    Info<<nl << "Access" << nl;
+    Info<<"list: " << flatOutput(list5) << nl;
+
+    for (const auto str : { "some", "list", "of", "words" })
+    {
+        Info<<"index of " << str << " = " << list5[str] << nl;
+    }
+
+    // Stream construct
+    {
+        ITstream input
+        (
+            "input",
+            "(plain list with some with list duplicates)"
+        );
+
+        hashedWordList list6(input);
+
+        Info<<nl << "Construct from stream" << nl;
+        Info<<"list: " << flatOutput(list6) << nl;
+
+        input.rewind();
+
+        input >> list4;
+        Info<<nl << "re-read from stream" << nl;
+        Info<<"list: " << flatOutput(list4) << nl;
+    }
+
+
+    Info<< "\nEnd\n";
+
+    return 0;
+}
+
+
+// ************************************************************************* //
diff --git a/src/OpenFOAM/primitives/strings/lists/hashedWordList.C b/src/OpenFOAM/primitives/strings/lists/hashedWordList.C
index d1a8a8ac9f..d47f7e42c9 100644
--- a/src/OpenFOAM/primitives/strings/lists/hashedWordList.C
+++ b/src/OpenFOAM/primitives/strings/lists/hashedWordList.C
@@ -2,8 +2,8 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
-     \\/     M anipulation  | Copyright (C) 2016-2017 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2016-2018 OpenCFD Ltd.
+     \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -24,118 +24,73 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "hashedWordList.H"
+#include "CStringList.H"
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 Foam::hashedWordList::hashedWordList
 (
-    const label count,
-    const char** lst,
-    const bool removeDuplicates
+    const label len,
+    const char** array,
+    bool unique
 )
 :
-    List<word>(count)
+    wordList(len)
 {
-    forAll(*this, i)
+    for (label i=0; i < len; ++i)
     {
-        List<word>::operator[](i) = lst[i];
+        wordList::operator[](i) = array[i];
     }
 
-    rehash(removeDuplicates);
+    rehash(unique);
 }
 
 
-Foam::hashedWordList::hashedWordList
-(
-    const char** lst,
-    const bool removeDuplicates
-)
-{
-    // Determine the number of entries
-    label count = 0;
-    for (unsigned i = 0; lst[i] && *(lst[i]); ++i)
-    {
-        ++count;
-    }
-
-    List<word>::setSize(count);
-    forAll(*this, i)
-    {
-        List<word>::operator[](i) = lst[i];
-    }
-
-    rehash(removeDuplicates);
-}
+Foam::hashedWordList::hashedWordList(const char** array, bool unique)
+:
+    hashedWordList(CStringList::count(array), array, unique)
+{}
 
 
-Foam::hashedWordList::hashedWordList(Istream& is)
-{
-    is  >> *this;
-}
-
-
-// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
-
-void Foam::hashedWordList::transfer
-(
-    List<word>& lst,
-    const bool removeDuplicates
-)
-{
-    List<word>::transfer(lst);
-    rehash(removeDuplicates);
-}
-
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 void Foam::hashedWordList::rehash() const
 {
-    indices_.clear();
+    lookup_.clear();
 
-    forAll(*this, i)
+    const wordUList& list = *this;
+    const label len = list.size();
+
+    for (label i=0; i < len; ++i)
     {
-        indices_.insert(List<word>::operator[](i), i);
+        lookup_.insert(list[i], i);
     }
 }
 
 
 void Foam::hashedWordList::uniq()
 {
-    indices_.clear();
+    lookup_.clear();
 
-    label nElem = 0;
-    forAll(*this, i)
+    wordList& list = *this;
+    const label len = list.size();
+
+    label count = 0;
+    for (label i=0; i < len; ++i)
     {
-        const word& item = List<word>::operator[](i);
+        word& item = list[i];
 
-        if (indices_.insert(item, nElem))
+        if (lookup_.insert(item, i))
         {
-            if (nElem != i)
+            if (count != i)
             {
-                List<word>::operator[](nElem) = item;
+                list[count] = std::move(item);
             }
-            ++nElem;
+            ++count;
         }
     }
 
-    List<word>::setSize(nElem);
-}
-
-
-// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
-
-Foam::Istream& Foam::operator>>(Istream& is, hashedWordList& lst)
-{
-    is  >> static_cast<List<word>&>(lst);
-    lst.rehash();
-
-    return is;
-}
-
-
-Foam::Ostream& Foam::operator<<(Ostream& os, const hashedWordList& lst)
-{
-    os  << static_cast<const UList<word>&>(lst);
-    return os;
+    list.resize(count);
 }
 
 
diff --git a/src/OpenFOAM/primitives/strings/lists/hashedWordList.H b/src/OpenFOAM/primitives/strings/lists/hashedWordList.H
index a2e68df9df..c7a451942e 100644
--- a/src/OpenFOAM/primitives/strings/lists/hashedWordList.H
+++ b/src/OpenFOAM/primitives/strings/lists/hashedWordList.H
@@ -25,7 +25,8 @@ Class
     Foam::hashedWordList
 
 Description
-    A wordList with hashed indices for additional fast lookup by name.
+    A wordList with hashed named lookup, which can be faster in some
+    situations than using the normal list find/found methods.
 
 SourceFiles
     hashedWordListI.H
@@ -44,11 +45,9 @@ SourceFiles
 namespace Foam
 {
 
+// Forward declarations
 class hashedWordList;
-
-// Forward declaration of friend functions and operators
-Istream& operator>>(Istream& is, hashedWordList& lst);
-Ostream& operator<<(Ostream& os, const hashedWordList& lst);
+inline Istream& operator>>(Istream& is, hashedWordList& lst);
 
 
 /*---------------------------------------------------------------------------*\
@@ -57,44 +56,34 @@ Ostream& operator<<(Ostream& os, const hashedWordList& lst);
 
 class hashedWordList
 :
-    public List<word>
+    public wordList
 {
-    // Private data
+    // Private Data
 
-        //- Hash of words/indices
-        mutable HashTable<label> indices_;
-
-
-    // Private Member Functions
-
-        //- Rebuild the lookup hash or make unique entries first.
-        inline void rehash(const bool unique);
+        //- Lookup HashTable of words vs list-indices
+        mutable HashTable<label> lookup_;
 
 public:
 
     // Constructors
 
-        //- Construct null
-        inline hashedWordList();
+        //- Construct an empty list
+        inline hashedWordList() = default;
 
-        //- Copy constructor.
+        //- Copy construct.
         inline hashedWordList(const hashedWordList& lst);
 
-        //- Construct from list of words,
-        //  optionally eliminating duplicates
-        inline hashedWordList
-        (
-            const UList<word>& lst,
-            const bool removeDuplicates=false
-        );
+        //- Move construct.
+        inline hashedWordList(hashedWordList&& lst);
 
-        //- Construct by transferring the parameter contents,
-        //  optionally eliminating duplicates
-        inline hashedWordList
-        (
-            const Xfer<List<word>>& lst,
-            const bool removeDuplicates=false
-        );
+        //- Copy construct from list of words
+        inline explicit hashedWordList(const wordUList& lst);
+
+        //- Copy construct from list of words, eliminating duplicates
+        inline hashedWordList(const wordUList& lst, bool unique);
+
+        //- Move construct from list of words, optionally eliminating duplicates
+        inline hashedWordList(wordList&& lst, bool unique=false);
 
         //- Construct from an initializer list
         inline hashedWordList(std::initializer_list<word> lst);
@@ -110,19 +99,14 @@ public:
 
         //- Construct from number and list of words,
         //  optionally eliminating duplicates
-        hashedWordList
-        (
-            const label count,
-            const char** lst,
-            const bool removeDuplicates=false
-        );
+        hashedWordList(const label len, const char** array, bool unique=false);
 
         //- Construct from a nullptr-terminated list of words,
         //  optionally eliminating duplicates
-        hashedWordList(const char** lst, const bool removeDuplicates=false);
+        hashedWordList(const char** array, bool unique=false);
 
         //- Construct from Istream
-        hashedWordList(Istream& is);
+        inline hashedWordList(Istream& is);
 
 
     // Member Functions
@@ -132,7 +116,7 @@ public:
 
         //- Append an element at the end of the list,
         //  optionally avoid append if it would be a duplicate entry
-        inline void append(const word& name, const bool avoidDuplicates=false);
+        inline void append(const word& name, bool unique=false);
 
         //- Does the list contain the specified name
         inline bool found(const word& name) const;
@@ -143,51 +127,64 @@ public:
         //- Return the hash of words/indices for inspection
         inline const HashTable<label>& lookup() const;
 
+        //- Swap contents
+        inline void swap(hashedWordList& lst);
+
+        //- Transfer contents of the argument into this list
+        //- and annul the argument list, optionally eliminating duplicates
+        inline void transfer(hashedWordList& lst);
+
         //- Transfer the contents of the argument List into this list
-        //  and annul the argument list,
-        //  optionally eliminating duplicates
-        void transfer(List<word>& lst, const bool removeDuplicates=false);
+        //- and annul the argument list, optionally eliminating duplicates
+        inline void transfer(wordList& lst, bool unique=false);
 
         //- Rebuild the lookup hash indices
         void rehash() const;
 
+        //- Rebuild the lookup hash indices, or make unique entries first.
+        inline void rehash(bool unique);
+
+        //- Adjust the list (if needed) to eliminate duplicate entries,
+        //- and rehash the indices
+        void uniq();
+
         //- Sort the list and rehash the indices
         inline void sort();
 
-        //- Adjust the list if necessary to eliminate duplicate entries,
-        //  and rehash the indices
-        void uniq();
-
 
     // Member Operators
 
-        //- Return name corresponding to specified index
+        //- Return name corresponding to specified index.
+        //  Fatal for out of range values.
         inline const word& operator[](const label index) const;
 
         //- Return index corresponding to specified name, or -1 on failure
         inline label operator[](const word& name) const;
 
-        //- Does the list contain the specified name - same as found.
-        //  Makes hashedWordList suitable as a unary predicate.
+        //- Check hashed values for the specified name - same as found.
+        //  Can be used as a unary predicate.
         inline bool operator()(const word& name) const;
 
 
       // Assignment
 
-        //- Assignment operator from list of words. Rehashes the indices.
-        inline void operator=(const UList<word>& lst);
-
-        //- Assignment operator from initializer list. Rehashes the indices.
-        inline void operator=(std::initializer_list<word> lst);
-
-        //- Assignment operator. Rehashes the indices.
+        //- Copy assignment. Rehashes the indices.
         inline void operator=(const hashedWordList& lst);
 
+        //- Copy assignment from list of words. Rehashes the indices.
+        inline void operator=(const wordUList& lst);
 
-    // Istream operators
+        //- Copy assignment from initializer list. Rehashes the indices.
+        inline void operator=(std::initializer_list<word> lst);
 
-        friend Istream& operator>>(Istream& is, hashedWordList& lst);
-        friend Ostream& operator<<(Ostream& os, const hashedWordList& lst);
+        //- Move assignment operator.
+        inline void operator=(hashedWordList&& lst);
+
+        //- Move assignment from list of words. Rehashes the indices.
+        inline void operator=(wordList&& lst);
+
+        //- Read from an input stream. Rehashes the indices.
+        inline friend Istream& operator>>(Istream& is, hashedWordList& lst);
 };
 
 
diff --git a/src/OpenFOAM/primitives/strings/lists/hashedWordListI.H b/src/OpenFOAM/primitives/strings/lists/hashedWordListI.H
index f57ef3abca..0f7971c0c2 100644
--- a/src/OpenFOAM/primitives/strings/lists/hashedWordListI.H
+++ b/src/OpenFOAM/primitives/strings/lists/hashedWordListI.H
@@ -2,8 +2,8 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
-     \\/     M anipulation  | Copyright (C) 2016-2017 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2016-2018 OpenCFD Ltd.
+     \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -23,64 +23,46 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
-
-inline void Foam::hashedWordList::rehash(const bool unique)
-{
-    if (unique)
-    {
-        uniq();
-    }
-    else
-    {
-        rehash();
-    }
-}
-
-
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-inline Foam::hashedWordList::hashedWordList()
-:
-    List<word>()
-{}
-
-
 inline Foam::hashedWordList::hashedWordList(const hashedWordList& lst)
 :
-    List<word>(static_cast<const UList<word>&>(lst))
+    hashedWordList(static_cast<const wordUList&>(lst), false)
+{}
+
+
+inline Foam::hashedWordList::hashedWordList(hashedWordList&& lst)
+:
+    wordList(std::move(static_cast<wordList&>(lst))),
+    lookup_(std::move(lst.lookup_))
+{}
+
+
+inline Foam::hashedWordList::hashedWordList(const wordUList& lst)
+:
+    hashedWordList(lst, false)
+{}
+
+
+inline Foam::hashedWordList::hashedWordList(const wordUList& lst, bool unique)
+:
+    wordList(lst)
 {
-    rehash();
+    rehash(unique);
 }
 
 
-inline Foam::hashedWordList::hashedWordList
-(
-    const UList<word>& lst,
-    const bool removeDuplicates
-)
+inline Foam::hashedWordList::hashedWordList(wordList&& lst, bool unique)
 :
-    List<word>(lst)
+    wordList(std::move(lst))
 {
-    rehash(removeDuplicates);
-}
-
-
-inline Foam::hashedWordList::hashedWordList
-(
-    const Xfer<List<word>>& lst,
-    const bool removeDuplicates
-)
-:
-    List<word>(lst)
-{
-    rehash(removeDuplicates);
+    rehash(unique);
 }
 
 
 inline Foam::hashedWordList::hashedWordList(std::initializer_list<word> lst)
 :
-    List<word>(lst)
+    wordList(lst)
 {
     rehash();
 }
@@ -92,37 +74,41 @@ inline Foam::hashedWordList::hashedWordList
     const HashTable<AnyType, word, AnyHash>& tbl
 )
 :
-    List<word>(tbl.size())
+    wordList(tbl.size())
 {
+    wordList& list = *this;
+
     label count = 0;
     for (auto iter = tbl.cbegin(); iter != tbl.cend(); ++iter)
     {
-        List<word>::operator[](count++) = iter.key();
+        list[count++] = iter.key();
     }
 
     this->sort();
 }
 
 
+inline Foam::hashedWordList::hashedWordList(Istream& is)
+{
+    is  >> *this;
+}
+
+
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 inline void Foam::hashedWordList::clear()
 {
-    List<word>::clear();
-    indices_.clear();
+    wordList::clear();
+    lookup_.clear();
 }
 
 
-inline void Foam::hashedWordList::append
-(
-    const word& name,
-    const bool avoidDuplicates
-)
+inline void Foam::hashedWordList::append(const word& name, bool unique)
 {
     // name is either unique or we don't care about duplicates
-    if (indices_.insert(name, size()) || !avoidDuplicates)
+    if (lookup_.insert(name, size()) || !unique)
     {
-        List<word>::append(name);
+        wordList::append(name);
     }
 }
 
@@ -130,19 +116,64 @@ inline void Foam::hashedWordList::append
 inline const Foam::HashTable<Foam::label>&
 Foam::hashedWordList::lookup() const
 {
-    return indices_;
+    const label lenList = wordList::size();
+    const label lenHash = lookup_.size();
+
+    if ((lenList < lenHash) || (lenList && !lenHash))
+    {
+        rehash();   // Was somehow out of sync
+    }
+
+    return lookup_;
 }
 
 
 inline bool Foam::hashedWordList::found(const word& name) const
 {
-    return indices_.found(name);
+    return lookup().found(name);
 }
 
 
 inline bool Foam::hashedWordList::contains(const word& name) const
 {
-    return indices_.found(name);
+    return lookup().found(name);
+}
+
+
+inline void Foam::hashedWordList::swap(hashedWordList& lst)
+{
+    wordList::swap(static_cast<wordList&>(lst));
+    lookup_.swap(lst.lookup_);
+}
+
+
+inline void Foam::hashedWordList::transfer
+(
+    hashedWordList& lst
+)
+{
+    wordList::transfer(static_cast<wordList&>(lst));
+    lookup_.transfer(lst.lookup_);
+}
+
+
+inline void Foam::hashedWordList::transfer(wordList& lst, bool unique)
+{
+    wordList::transfer(lst);
+    rehash(unique);
+}
+
+
+inline void Foam::hashedWordList::rehash(bool unique)
+{
+    if (unique)
+    {
+        uniq();
+    }
+    else
+    {
+        rehash();
+    }
 }
 
 
@@ -160,46 +191,65 @@ inline const Foam::word& Foam::hashedWordList::operator[]
     const label index
 ) const
 {
-    return List<word>::operator[](index);
+    return wordList::operator[](index);
 }
 
 
 inline Foam::label Foam::hashedWordList::operator[](const word& name) const
 {
-    auto iter = indices_.find(name);
-
-    if (iter.found())
-    {
-        return iter.object();
-    }
-
-    return -1;  // Not found (or not hashed?)
+    return lookup_.lookup(name, -1);  // -1 = not found or not hashed
 }
 
 
 inline bool Foam::hashedWordList::operator()(const word& name) const
 {
-    return indices_.found(name);
+    return lookup_.found(name);
 }
 
 
-inline void Foam::hashedWordList::operator=(const UList<word>& lst)
+inline void Foam::hashedWordList::operator=(const hashedWordList& lst)
 {
-    List<word>::operator=(lst);
+    wordList::operator=(lst);
+    rehash();
+}
+
+
+inline void Foam::hashedWordList::operator=(const wordUList& lst)
+{
+    wordList::operator=(lst);
     rehash();
 }
 
 
 inline void Foam::hashedWordList::operator=(std::initializer_list<word> lst)
 {
-    List<word>::operator=(lst);
+    wordList::operator=(lst);
     rehash();
 }
 
 
-inline void Foam::hashedWordList::operator=(const hashedWordList& lst)
+inline void Foam::hashedWordList::operator=(hashedWordList&& lst)
 {
-    operator=(static_cast<const UList<word>&>(lst));
+    wordList::operator=(std::move(static_cast<wordList&>(lst)));
+    lookup_ = std::move(lst.lookup_);
+}
+
+
+inline void Foam::hashedWordList::operator=(wordList&& lst)
+{
+    wordList::operator=(std::move(lst));
+    rehash();
+}
+
+
+// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
+
+inline Foam::Istream& Foam::operator>>(Istream& is, hashedWordList& lst)
+{
+    is  >> static_cast<wordList&>(lst);
+    lst.rehash();
+
+    return is;
 }