thresher vs thresher shark

thresher and thresher shark both are nouns.

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

As nouns, thresher and thresher shark are synonyms defined as:

thresher and thresher shark: 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, thrasher.

thresher (noun)	thresher shark (noun)
large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed	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