family tree vs tribe

family tree and tribe both are nouns.

Word	Noun	Adjective	Verb	Adverb
family tree	Yes	No	No	No
tribe	Yes	No	No	No

As nouns, tribe is a hypernym of family tree; that is, tribe is a word with a broader meaning than family tree:

Other hypernyms of family tree include clan, kin, kin group, kindred, kinship group.

family tree (noun)	tribe (noun)
successive generations of kin	a social division of (usually preliterate) people
	a federation (as of American Indians)
	group of people related by blood or marriage
	(biology) a taxonomic category between a genus and a subfamily