nut in WordNet English dictionary

1. someone who is so ardently devoted to something that it resembles an addiction
   "a golf addict"; "a car nut"; "a bodybuilding freak"; "a news junkie"
   addict  nut  freak  junkie  junky 
   
2. one of the two male reproductive glands that produce spermatozoa and secrete androgens
   "she kicked him in the balls and got away"
   testis  testicle  orchis  ball  ballock  bollock  nut  egg 
   
3. a whimsically eccentric person
   crackpot  crank  nut  nut case  fruitcake  screwball 
   
4. half the width of an em
   en  nut 
   
5. a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
   nut 
   
6. usually large hard-shelled seed
   nut 
   

1. gather nuts
   nut