rock gunnel vs Pholis gunnellus

rock gunnel and Pholis gunnellus both are nouns.

Word	Noun	Adjective	Verb	Adverb
rock gunnel	Yes	No	No	No
Pholis gunnellus	Yes	No	No	No

As nouns, rock gunnel and Pholis gunnellus are synonyms defined as:

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

Other synonyms of rock gunnel include butterfish.

rock gunnel (noun)	Pholis gunnellus (noun)
slippery scaleless food fish of the northern Atlantic coastal waters	slippery scaleless food fish of the northern Atlantic coastal waters