tribe vs social group

tribe and social group both are nouns.

Word	Noun	Adjective	Verb	Adverb
tribe	Yes	No	No	No
social group	Yes	No	No	No

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

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

tribe (noun)	social group (noun)
a social division of (usually preliterate) people	people sharing some social relation
a federation (as of American Indians)
group of people related by blood or marriage
(biology) a taxonomic category between a genus and a subfamily