tribe n. 1: A unit of sociopolitical organization consisting of a number of families, clans, or other groups who share a common ancestry and culture and among whom leadership is typically neither formalized nor permanent; 2: a social division of (usually preliterate) people.
assemblage
collection
compilation
levy
contesseration
gathering
conventicle
gemote
conflux
colligation
levee
assembly
congress
attroupement
convergence
meeting
conclave
posse comitatus
convention
congregation
miscellany
collectanea
menagerie
crowd
throng
rabble
mob
cohue
horde
crew
gang
band
concourse
collocation
party
swarm
collocation
flock
atajo
remuda
covey
roundup
array
bevy
troupe