diff --git a/src/terms.js b/src/terms.js
index add1fb0..35e7e81 100644
--- a/src/terms.js
+++ b/src/terms.js
@@ -208,6 +208,9 @@ export default [
     'focus(es|ing)?',
     'foot view',
     'forward-thinking',
+    'free'
+    'operation'
+    'operation!'
     'fosters?',
     'four pillars',
     'freemium',