diff --git a/doc/src/bond_bpm_spring.rst b/doc/src/bond_bpm_spring.rst
index 69d8e2d491..ac83ad4543 100644
--- a/doc/src/bond_bpm_spring.rst
+++ b/doc/src/bond_bpm_spring.rst
@@ -153,7 +153,7 @@ the data file or restart files read by the :doc:`read_data
 <read_data>` or :doc:`read_restart <read_restart>` commands:
 
 * :math:`k`             (force/distance units)
-* :math:`\epsilon_c`    (unit less)
+* :math:`\epsilon_c`    (unitless)
 * :math:`\gamma`        (force/velocity units)
 
 Additionally, if *volume/factor* is set to *yes*, a fourth coefficient
diff --git a/doc/src/bond_bpm_spring_plastic.rst b/doc/src/bond_bpm_spring_plastic.rst
index fb0c50e9d3..8597501f6f 100644
--- a/doc/src/bond_bpm_spring_plastic.rst
+++ b/doc/src/bond_bpm_spring_plastic.rst
@@ -108,9 +108,9 @@ the data file or restart files read by the :doc:`read_data
 <read_data>` or :doc:`read_restart <read_restart>` commands:
 
 * :math:`k`             (force/distance units)
-* :math:`\epsilon_c`    (unit less)
+* :math:`\epsilon_c`    (unitless)
 * :math:`\gamma`        (force/velocity units)
-* :math:`\epsilon_p     (unit less)
+* :math:`\epsilon_p`    (unitless)
 
 See the :doc:`bpm/spring doc page <bond_bpm_spring>` for information on
 the *smooth*, *normalize*, *break*, *overlay/pair*, and *store/local*
diff --git a/doc/src/bond_rheo_shell.rst b/doc/src/bond_rheo_shell.rst
index 090f5ab7aa..ef8d7d4249 100644
--- a/doc/src/bond_rheo_shell.rst
+++ b/doc/src/bond_rheo_shell.rst
@@ -94,7 +94,7 @@ the data file or restart files read by the :doc:`read_data
 <read_data>` or :doc:`read_restart <read_restart>` commands:
 
 * :math:`k`             (force/distance units)
-* :math:`\epsilon_c`    (unit less)
+* :math:`\epsilon_c`    (unitless)
 * :math:`\gamma`        (force/velocity units)
 
 Unlike other BPM-style bonds, this bond style does not update special