aquatics vs swim

aquatics and swim both are nouns.

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

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

Other hyponyms of aquatics include swimming, surfboarding, surfing, surfriding, water-skiing.

aquatics (noun)	swim (noun)
sports that involve bodies of water	the act of swimming

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