tribe vs Bovini

tribe and Bovini both are nouns.

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

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

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

tribe (noun)	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