Words with the same meaning
I believe the answer is:
synonyms
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">words with the same meaning</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for synonyms that I've seen before include "Words that can be interchanged with others" , "Interchangeable words" , "Two words that can be interchanged" , "Words with meanings similar to those of others" , "Two words with the same meaning" .)