seasnail vs scorpaenoid

seasnail and scorpaenoid both are nouns.

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

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

seasnail: small tadpole-shaped cold-water fishes with pelvic fins forming a sucker; related to lumpfish
scorpaenoid: fishes having the head armored with bony plates

Other hypernyms of seasnail include scorpaenoid fish.

seasnail (noun)	scorpaenoid (noun)
small tadpole-shaped cold-water fishes with pelvic fins forming a sucker; related to lumpfish	fishes having the head armored with bony plates
any of several creeping marine gastropods with a spirally coiled shell: whelks, tritons, moon shells, neritids