tube-nosed bat vs fruit bat

tube-nosed bat and fruit bat both are nouns.

Word	Noun	Adjective	Verb	Adverb
tube-nosed bat	Yes	No	No	No
fruit bat	Yes	No	No	No

As nouns, fruit bat is a hypernym of tube-nosed bat; that is, fruit bat is a word with a broader meaning than tube-nosed bat:

tube-nosed bat: any of various fruit bats of the genus Nyctimene distinguished by nostrils drawn out into diverging tubes
fruit bat: large Old World bat of warm and tropical regions that feeds on fruit

Other hypernyms of tube-nosed bat include megabat.

tube-nosed bat (noun)	fruit bat (noun)
any of various fruit bats of the genus Nyctimene distinguished by nostrils drawn out into diverging tubes	large Old World bat of warm and tropical regions that feeds on fruit