Added variations on 'difference'

codespell_lib/data/dictionary.txt

diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index b1df2bd..3f87255 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -12688,8 +12688,11 @@
 differnty->different, differently,
 differred->differed
 differrence->difference
+differrences->differences
 differrent->different
 difffered->differed
+diffference->difference
+diffferences->differences
 diffferent->different
 diffferently->differently
 difffers->differs