clump

[1]	lump , mass , heap , collect , gather , bunch , pile
[2]	clop , clunk , plunk
[3]	cluster , constellate , flock
[4]	clomp
[5]	bunch , bunch up , bundle , cluster

[1]	bunch , lump , mass , cluster , clod , clustering , chunk , hunk , wad , gob , (Colloq) glob
[2]	bunch , ball , clod , cluster , thicket , glob , lump , copse , wood , chunk , (Mainly Brit) spinney
[3]	thump , thumping , clunk , thud