diff --git a/src/terms.js b/src/terms.js
index 59a770d..62bd883 100644
--- a/src/terms.js
+++ b/src/terms.js
@@ -453,6 +453,7 @@ export default [
     'up.to.speed',
     'up-?sell',
     'upside',
+    '(up|down)time',
     'user.friendly',
     'user funnels?',
     'user.experience',