Pholis gunnellus vs butterfish

Pholis gunnellus and butterfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pholis gunnellus	Yes	No	No	No
butterfish	Yes	No	No	No

As nouns, Pholis gunnellus and butterfish are synonyms defined as:

Pholis gunnellus and butterfish: slippery scaleless food fish of the northern Atlantic coastal waters

Other synonyms of Pholis gunnellus include rock gunnel.

Pholis gunnellus (noun)	butterfish (noun)
slippery scaleless food fish of the northern Atlantic coastal waters	small marine fish with a short compressed body and feeble spines
	slippery scaleless food fish of the northern Atlantic coastal waters
	any of numerous small flat Atlantic food fish having smooth skin