flathead vs scorpaenoid fish

flathead and scorpaenoid fish both are nouns.

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

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

flathead: food fish of the Indonesian region of the Pacific; resembles gurnards
scorpaenoid fish: fishes having the head armored with bony plates

Other hypernyms of flathead include scorpaenoid.

flathead (noun)	scorpaenoid fish (noun)
food fish of the Indonesian region of the Pacific; resembles gurnards	fishes having the head armored with bony plates
pallid bottom-dwelling flat-headed fish with large eyes and a duck-like snout