flathead vs scorpaenoid

flathead and scorpaenoid both are nouns.

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

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

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

Other hypernyms of flathead include scorpaenoid fish.

flathead (noun)	scorpaenoid (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