thrash vs thrasher

thrash and thrasher both are nouns.

Word	Noun	Adjective	Verb	Adverb
thrash	Yes	No	Yes	No
thrasher	Yes	No	No	No

thrash (noun)	thrasher (noun)
a swimming kick used while treading water	thrush-like American songbird able to mimic other birdsongs
	large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed
	a farm machine for separating seeds or grain from the husks and straw

thrash (verb)	thrasher (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