thrash vs treading water

thrash and treading water both are nouns.

Word	Noun	Adjective	Verb	Adverb
thrash	Yes	No	Yes	No
treading water	Yes	No	No	No

thrash (noun)	treading water (noun)
a swimming kick used while treading water	a stroke that keeps the head above water by thrashing the legs and arms

thrash (verb)	treading water (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