pecker in WordNet English dictionary

1. horny projecting mouth of a bird
   beak  bill  neb  nib  pecker 
   
2. obscene terms for penis
   cock  prick  dick  shaft  pecker  peter  tool  putz 
   
3. bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects
   woodpecker  peckerwood  pecker