thresher vs fox shark

thresher and fox shark both are nouns.

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

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

thresher and fox 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, thrasher, thresher shark.

thresher (noun)	fox 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