Cynopterus sphinx vs fruit bat

Cynopterus sphinx and fruit bat both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cynopterus sphinx	Yes	No	No	No
fruit bat	Yes	No	No	No

As nouns, fruit bat is a hypernym of Cynopterus sphinx; that is, fruit bat is a word with a broader meaning than Cynopterus sphinx:

Cynopterus sphinx: a variety of fruit eating bat
fruit bat: large Old World bat of warm and tropical regions that feeds on fruit

Other hypernyms of Cynopterus sphinx include megabat.

Cynopterus sphinx (noun)	fruit bat (noun)
a variety of fruit eating bat	large Old World bat of warm and tropical regions that feeds on fruit