cluster (
http://definr.com/cluster)
n : a grouping of a number of similar things; "a bunch of
trees"; "a cluster of admirers" [syn:
bunch,
clump,
clustering]
v 1: come together as in a cluster or flock; "The poets
constellate in this town every summer" [syn:
constellate,
flock,
clump]
2: gather or cause to gather into a cluster; "She bunched her
fingers into a fist"; "The students bunched up at the
registration desk" [syn:
bunch,
bunch up,
bundle,
clump]