thrasher vs Alopius vulpinus

thrasher and Alopius vulpinus both are nouns.

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

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

thrasher 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 thrasher include fox shark, thresher, thresher shark.

thrasher (noun)	Alopius vulpinus (noun)
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
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