diff --git a/src/collective/dms/thesaurus/dmskeyword.py b/src/collective/dms/thesaurus/dmskeyword.py
index 2e490f2..6b72217 100644
--- a/src/collective/dms/thesaurus/dmskeyword.py
+++ b/src/collective/dms/thesaurus/dmskeyword.py
@@ -61,6 +61,22 @@ class DmsKeyword(Item):
     """ """
     implements(IDmsKeyword)
 
+    def get_words_for_indexation(self, limit=5):
+        thesaurus = aq_parent(self)
+        words = []
+        words.append(self.title)
+        for word in self.equivs or []:
+            words.append(word)
+        if limit > 0:
+            for broader_keyword in self.broader or []:
+                try:
+                    keyword = thesaurus[broader_keyword]
+                except KeyError:
+                    continue
+                words.append(keyword.get_words_for_indexation(limit=limit-1))
+        return ' '.join(words)
+
+
 
 class DmsKeywordSchemaPolicy(DexteritySchemaPolicy):
     """ """