Other forms: monstrosities
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.