gurnard vs scorpaenoid fish

gurnard and scorpaenoid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
gurnard	Yes	No	No	No
scorpaenoid fish	Yes	No	No	No

As nouns, scorpaenoid fish is a hypernym of gurnard; that is, scorpaenoid fish is a word with a broader meaning than gurnard:

gurnard: bottom-dwelling coastal fishes with spiny armored heads and fingerlike pectoral fins used for crawling along the sea bottom
scorpaenoid fish: fishes having the head armored with bony plates

Other hypernyms of gurnard include scorpaenoid.

gurnard (noun)	scorpaenoid fish (noun)
bottom-dwelling coastal fishes with spiny armored heads and fingerlike pectoral fins used for crawling along the sea bottom	fishes having the head armored with bony plates