clump

a grouping of a number of similar things; "a bunch of trees"; "a cluster of admirers"

a compact mass; "a ball of mud caught him on the shoulder"

a heavy dull sound (as made by impact of heavy objects)

make or move along with a sound as of a horse's hooves striking the ground

come together as in a cluster or flock; "The poets constellate in this town every summer"

walk clumsily

gather or cause to gather into a cluster; "She bunched her fingers into a fist"