diff --git a/etc/vim/spell/en.utf-8.add b/etc/vim/spell/en.utf-8.add
index 1a8a0c4..716ec9c 100644
--- a/etc/vim/spell/en.utf-8.add
+++ b/etc/vim/spell/en.utf-8.add
@@ -83,3 +83,7 @@ rightsholders
 backend
 Devs
 backends
+Anecdotally
+extensibility
+signalling
+WebRTC