snorkel vs dive

snorkel and dive both are nouns.

Word	Noun	Adjective	Verb	Adverb
snorkel	Yes	No	Yes	No
dive	Yes	No	Yes	No

As verbs, dive is a hypernym of snorkel; that is, dive is a word with a broader meaning than snorkel:

snorkel (noun)	dive (noun)
air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time	a steep nose-down descent by an aircraft
breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface; allows swimmer to breathe while face down in the water	a headlong plunge into water
	a cheap disreputable nightclub or dance hall