diff --git a/pages/Operator or maintainer training material.md b/pages/Operator or maintainer training material.md
index 8a421fe..743eb26 100644
--- a/pages/Operator or maintainer training material.md	
+++ b/pages/Operator or maintainer training material.md	
@@ -2,4 +2,4 @@ type:: [[Business object]]
 terraphimrole:: [[System operator]]
 source:: [[@Digital Systems Engineering Process Model Version 1]]
 documentation:: Training capabilities and documentation.
-synonyms:: certification standards
+synonyms:: taxi instructions, certification standards