fin whale vs finback whale

fin whale and finback whale both are nouns.

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

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

fin whale and finback whale: 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.

fin whale (noun)	finback whale (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