Words with the same meanings as others (8)
I believe the answer is:
synonyms
'words with the same meanings as others' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for synonyms that I've seen before include "Two words that can be interchanged" , "Two words with the same meaning" , "Words with meanings similar to those of others" , "words such as faith, religion and belief" , "Interchangeable words" .)