noun (n)

• the part of an animal that corresponds to the human buttocks(noun.animal)

  Synonym:
  croup, croupe, hindquarters
  

  source: wordnet30
• fleshy hindquarters; behind the loin and above the round(noun.food)

  source: wordnet30
• the fleshy part of the human body that you sit on(noun.body)

  Synonym:
  arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rea
  

  source: wordnet30
• The end of the backbone of an animal, with the parts adjacent; the buttock or buttocks.(noun)

  source: webster1913