cluster

[1]	constellate , flock , clump
[2]	bunch , collect , bunch , bunch up , bundle , group , band , clump , gather , crowd , congregate , throng , assemble , accumulate , mass , aggregate

[1]	bunch , collection , bunch , clump , clustering , clutch , tuft , bundle
[2]	collection , bunch , group , knot , body , band , company , gathering , crowd , assembly , congregation , throng , flock , assemblage , swarm