Nouns

(n)bunch, clump, cluster, clusteringa grouping of a number of similar things“a bunch of trees”, “a cluster of admirers”

Verbs

(v)cluster, constellate, flock, clumpcome together as in a cluster or flock“The poets constellate in this town every summer”
(v)bunch, bundle, cluster, clumpgather or cause to gather into a cluster“She bunched her fingers into a fist”