diff --git a/codespell_lib/data/dictionary_rare.txt b/codespell_lib/data/dictionary_rare.txt
index b5f49df..406d8b5 100644
--- a/codespell_lib/data/dictionary_rare.txt
+++ b/codespell_lib/data/dictionary_rare.txt
@@ -89,6 +89,7 @@
 payed->paid
 planed->planned
 pleas->please
+pneumonic->mnemonic, pneumonia,
 preform->perform
 preformed->performed
 preforms->performs