noun (n)

• a person or animal that is markedly unusual or deformed(noun.person)

  Synonym:
  freak, lusus naturae, monster
  

  source: wordnet30
• something hideous or frightful(noun.event)

  Example:
  They regarded the atom bomb as a monstrosity.
  

  source: wordnet30
• The state of being monstrous, or out of the common order of nature; that which is monstrous; a monster.(noun)

  source: webster1913