thresher vs thrasher

thresher and thrasher both are nouns.

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

As nouns, thresher and thrasher are synonyms defined as:

thresher and thrasher: large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed

Other synonyms of thresher include Alopius vulpinus, fox shark, thresher shark.

As nouns, thresher and thrasher are synonyms defined as:

thresher and thrasher: a farm machine for separating seeds or grain from the husks and straw

Other synonyms of thresher include threshing machine.

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