Nouns

(n)bunch, clump, cluster, clusteringa grouping of a number of similar things“a bunch of trees”, “a cluster of admirers”
(n)crowd, crew, gang, bunchan informal body of friends“he still hangs out with the same crowd”
(n)bunch, lot, caboodleany collection in its entirety“she bought the whole caboodle”

Verbs

(v)bunch together, bunch, bunch upform into a bunch“The frightened children bunched together in the corner of the classroom”
(v)bunch, bundle, cluster, clumpgather or cause to gather into a cluster“She bunched her fingers into a fist”