diff --git a/cspell-wordlist.txt b/cspell-wordlist.txt
index 785969053..090262807 100644
--- a/cspell-wordlist.txt
+++ b/cspell-wordlist.txt
@@ -30,6 +30,7 @@ prerenders
 proxied
 pseudocode
 runtimes
+shadowrootmode
 sourcemaps
 templating
 transpiles