fin whale vs finback

fin whale and finback both are nouns.

Word	Noun	Adjective	Verb	Adverb
fin whale	Yes	No	No	No
finback	Yes	No	No	No

As nouns, fin whale and finback are synonyms defined as:

fin whale and finback: large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific

Other synonyms of fin whale include Balaenoptera physalus, common rorqual, finback whale.

fin whale (noun)	finback (noun)
large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific	large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific