wordfinder vs synonym finder

wordfinder and synonym finder both are nouns.

Word	Noun	Adjective	Verb	Adverb
wordfinder	Yes	No	No	No
synonym finder	Yes	No	No	No

As nouns, synonym finder is a hypernym of wordfinder; that is, synonym finder is a word with a broader meaning than wordfinder:

wordfinder: a thesaurus organized to help you find the word you want but cannot think of
synonym finder: a book containing a classified list of synonyms

Other hypernyms of wordfinder include thesaurus.

wordfinder (noun)	synonym finder (noun)
a thesaurus organized to help you find the word you want but cannot think of	a book containing a classified list of synonyms