swimming kick vs thrash

swimming kick and thrash both are nouns.

Word	Noun	Adjective	Verb	Adverb
swimming kick	Yes	No	No	No
thrash	Yes	No	Yes	No

As nouns, thrash is a hyponym of swimming kick; that is, thrash is a word with a more specific, narrower meaning than swimming kick:

Other hyponyms of swimming kick include flutter kick, frog kick, dolphin kick, scissors kick.

swimming kick (noun)	thrash (noun)
a movement of the legs in swimming	a swimming kick used while treading water

swimming kick (verb)	thrash (verb)
	give a thrashing to; beat hard
	beat the seeds out of a grain
	beat thoroughly and conclusively in a competition or fight
	dance the slam dance
	move or stir about violently
	beat so fast that (the heart's) output starts dropping until (it) does not manage to pump out blood at all
	move data into and out of core rather than performing useful computation