swim vs dive

swim and dive both are nouns.

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

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

Other hyponyms of swim include bathe, skinny-dip, dip, plunge, diving, floating, natation, skin-dive, skin diving.

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

Other hyponyms of swim include bathe, school, break water, fin, fin, paddle, crawl, breaststroke, backstroke.

swim (noun)	dive (noun)
the act of swimming	a steep nose-down descent by an aircraft
	a headlong plunge into water
	a cheap disreputable nightclub or dance hall

swim (verb)	dive (verb)
travel through water	drop steeply
be afloat either on or below a liquid surface and not sink to the bottom	swim under water
move as if gliding through water	plunge into water
be covered with or submerged in a liquid
be dizzy or giddy