tribe vs tribe Bovini

tribe and tribe Bovini both are nouns.

Word	Noun	Adjective	Verb	Adverb
tribe	Yes	No	No	No
tribe Bovini	Yes	No	No	No

As nouns, tribe Bovini is a hyponym of tribe; that is, tribe Bovini is a word with a more specific, narrower meaning than tribe:

tribe: (biology) a taxonomic category between a genus and a subfamily
tribe Bovini: term not used technically; essentially coextensive with genus Bos

Other hyponyms of tribe include Bovini, Bambuseae, tribe Bambuseae.

tribe (noun)	tribe Bovini (noun)
a social division of (usually preliterate) people	term not used technically; essentially coextensive with genus Bos
a federation (as of American Indians)
group of people related by blood or marriage
(biology) a taxonomic category between a genus and a subfamily