thresher vs Alopius vulpinus

thresher and Alopius vulpinus both are nouns.

Word	Noun	Adjective	Verb	Adverb
thresher	Yes	No	No	No
Alopius vulpinus	Yes	No	No	No

As nouns, thresher and Alopius vulpinus are synonyms defined as:

thresher and Alopius vulpinus: 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 fox shark, thrasher, thresher shark.

thresher (noun)	Alopius vulpinus (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