lump in WordNet English dictionary

1. a compact mass
   "a ball of mud caught him on the shoulder"
   ball  clod  glob  lump  clump  chunk 
   
2. an awkward stupid person
   lout  clod  stumblebum  goon  oaf  lubber  lummox  lump  gawk 
   
3. a large piece of something without definite shape
   "a hunk of bread"; "a lump of coal"
   hunk  lump 
   
4. an abnormal protuberance or localized enlargement
   swelling  puffiness  lump 
   

1. group or chunk together in a certain order or place side by side
   collocate  lump  chunk 
   
2. put together indiscriminately
   "lump together all the applicants"
   lump  chunk