scorpion fish vs scorpaenid

scorpion fish and scorpaenid both are nouns.

Word	Noun	Adjective	Verb	Adverb
scorpion fish	Yes	No	No	No
scorpaenid	Yes	No	No	No

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

scorpion fish: marine fishes having a tapering body with an armored head and venomous spines
scorpaenid: any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific

Other hypernyms of scorpion fish include scorpaenid fish.

scorpion fish (noun)	scorpaenid (noun)
marine fishes having a tapering body with an armored head and venomous spines	any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific