noun (n)

• hybrid offspring of a male donkey and a female horse; usually sterile(noun.animal)

  source: wordnet30
• a slipper that has no fitting around the heel(noun.artifact)

  Synonym:
  scuff
  

  source: wordnet30
• A hybrid animal; specifically, one generated between an ass and a mare, sometimes a horse and a she-ass. See Hinny.(noun)

  source: webster1913