dive vs snorkel

dive and snorkel both are nouns.

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

As verbs, snorkel is a hyponym of dive; that is, snorkel is a word with a more specific, narrower meaning than dive:

Other hyponyms of dive include skin-dive.

dive (noun)	snorkel (noun)
a steep nose-down descent by an aircraft	air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
a headlong plunge into water	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 cheap disreputable nightclub or dance hall