diff --git a/doc/src/fix_lb_fluid.txt b/doc/src/fix_lb_fluid.txt
index 1a5239782268f34870cd3ec3faac1b560f7c451a..d9012d8cb396371d3fd4568cbba35b19c5d6e275 100644
--- a/doc/src/fix_lb_fluid.txt
+++ b/doc/src/fix_lb_fluid.txt
@@ -187,7 +187,7 @@ NOTE: Care must be taken when choosing both a value for dx, and a
 simulation domain size.  This fix uses the same subdivision of the
 simulation domain among processors as the main LAMMPS program.  In
 order to uniformly cover the simulation domain with lattice sites, the
-lengths of the individual LAMMPS subdomains must all be evenly
+lengths of the individual LAMMPS sub-domains must all be evenly
 divisible by dx.  If the simulation domain size is cubic, with equal
 lengths in all dimensions, and the default value for dx is used, this
 will automatically be satisfied.
diff --git a/doc/src/replicate.txt b/doc/src/replicate.txt
index 0195dce9114f4a3d0bf30a805a1c0f0e31a70be7..79a481746ec8843b20d567a67b1c71a2a234e797 100644
--- a/doc/src/replicate.txt
+++ b/doc/src/replicate.txt
@@ -14,7 +14,7 @@ replicate nx ny nz {keyword} :pre
 
 nx,ny,nz = replication factors in each dimension :ulb
 optional {keyword} = {bbox} :l
-  {bbox} = only check atoms in replicas that overlap with a processor's subdomain :ule
+  {bbox} = only check atoms in replicas that overlap with a processor's sub-domain :ule
 
 [Examples:]
 
@@ -46,7 +46,7 @@ image flags that differ by 1.  This will allow the bond to be
 unwrapped appropriately.
 
 The optional keyword {bbox} uses a bounding box to only check atoms
-in replicas that overlap with a processor's subdomain when assigning
+in replicas that overlap with a processor's sub-domain when assigning
 atoms to processors, and thus can result in substantial speedups for
 calculations using a large number of processors. It does require
 temporarily using more memory.