A monstrosity is something so hideous that you can hardly stand to look at it, like a zombie or an ugly modern building.

A monster can certainly be described as a monstrosity, but so can anything that is as frightening or disgusting as a monster. A dictator's cruel regime is a monstrosity, and so is a three-headed fish. The word comes from the Latin word for monster, monstrum, with a root, monere, that means "warn," from the tradition of interpreting monstrous, deformed animals as omens — or warnings — of bad luck.

Definitions of monstrosity
  1. noun
    a person or animal that is markedly unusual or deformed
    synonyms: freak, lusus naturae, monster
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    the largest or most massive thing of its kind
    type of:
    mutant, mutation, sport, variation
    (biology) an organism that has characteristics resulting from chromosomal alteration
  2. noun
    something hideous or frightful
    “they regarded the atom bomb as a monstrosity
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    type of:
    malformation, miscreation
    something abnormal or anomalous
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