diff --git a/editor-support/vim/syntax/str.vim b/editor-support/vim/syntax/str.vim
index 9def1eb..21c8624 100644
--- a/editor-support/vim/syntax/str.vim
+++ b/editor-support/vim/syntax/str.vim
@@ -9,9 +9,9 @@ endif
 " Keywords (commands)
 syn keyword strKeyword exit paste copy infile outfile assign clear show undo redo history edit save load runfile script
 syn keyword strKeyword enclose lower upper lsub rsub prefix suffix quote unquote replace rev trim indent concat
-syn keyword strKeyword line word each on drop take missing lines words split chunk join sort unique zip
-syn match strKeyword "\<contains\>"
-syn keyword strKeyword to from set over call lipsum convert if unless
+syn keyword strKeyword line word each on drop take missing lines words split chunk join sort unique zip flatten group
+syn match   strKeyword "\<contains\>"
+syn keyword strKeyword to from set over call lipsum convert if unless while
 
 " Types
 syn match strType "::\s*\zs\(string\|int\|destructured\)"