common rorqual vs fin whale

common rorqual and fin whale both are nouns.

Word	Noun	Adjective	Verb	Adverb
common rorqual	Yes	No	No	No
fin whale	Yes	No	No	No

As nouns, common rorqual and fin whale are synonyms defined as:

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

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

common rorqual (noun)	fin 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