scorpaenid vs lionfish

scorpaenid and lionfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
scorpaenid	Yes	No	No	No
lionfish	Yes	No	No	No

As nouns, lionfish is a hyponym of scorpaenid; that is, lionfish is a word with a more specific, narrower meaning than scorpaenid:

scorpaenid: any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific
lionfish: brightly striped fish of the tropical Pacific having elongated spiny fins

Other hyponyms of scorpaenid include scorpion fish, scorpionfish, sea scorpion, stonefish, Synanceja verrucosa, rockfish.

scorpaenid (noun)	lionfish (noun)
any of numerous carnivorous usually bottom-dwelling warm-water marine fishes found worldwide but most abundant in the Pacific	brightly striped fish of the tropical Pacific having elongated spiny fins