pilot whale vs common blackfish

pilot whale and common blackfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
pilot whale	Yes	No	No	No
common blackfish	Yes	No	No	No

As nouns, pilot whale and common blackfish are synonyms defined as:

pilot whale and common blackfish: small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school

Other synonyms of pilot whale include black whale, blackfish, Globicephala melaena.

pilot whale (noun)	common blackfish (noun)
small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school	small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school