Synonyms for Tribe (same or very similar meaning)
WordNet sense 1 (a social division of (usually preliterate) people):
folkWordNet sense 2 (a federation (as of American Indians)):
federation of tribesWordNet sense 3 (group of people related by blood or marriage):
clan, kin, kindred, kin group, kinship groupFrom the ODE community, based on WordNetadd/edit