whelk vs snail

whelk and snail both are nouns.

Word	Noun	Adjective	Verb	Adverb
whelk	Yes	No	Yes	No
snail	Yes	No	Yes	No

As verbs, snail is a hypernym of whelk; that is, snail is a word with a broader meaning than whelk:

whelk (noun)	snail (noun)
large carnivorous marine gastropods of coastal waters and intertidal regions having a strong snail-like shell	freshwater or marine or terrestrial gastropod mollusk usually having an external enclosing spiral shell
large marine snail much used as food in Europe	edible terrestrial snail usually served in the shell with a sauce of melted butter and garlic

whelk (verb)	snail (verb)
gather whelk	gather snails