water sport vs swim

water sport and swim both are nouns.

Word	Noun	Adjective	Verb	Adverb
water sport	Yes	No	No	No
swim	Yes	No	Yes	No

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

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

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

water sport (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