clump in WordNet English dictionary

1. a compact mass
   "a ball of mud caught him on the shoulder"
   ball  clod  glob  lump  clump  chunk 
   
2. a grouping of a number of similar things
   "a bunch of trees"; "a cluster of admirers"
   bunch  clump  cluster  clustering 
   
3. a heavy dull sound (as made by impact of heavy objects)
   thump  thumping  clump  clunk  thud 
   

1. gather or cause to gather into a cluster
   "She bunched her fingers into a fist"
   bunch  bunch up  bundle  cluster  clump 
   
2. walk clumsily
   clump  clomp 
   
3. make or move along with a sound as of a horse's hooves striking the ground
   clop  clump  clunk  plunk 
   
4. come together as in a cluster or flock
   "The poets constellate in this town every summer"
   cluster  constellate  flock  clump