monstrosity vs lusus naturae

monstrosity and lusus naturae both are nouns.

Word	Noun	Adjective	Verb	Adverb
monstrosity	Yes	No	No	No
lusus naturae	Yes	No	No	No

As nouns, monstrosity and lusus naturae are synonyms defined as:

monstrosity and lusus naturae: a person or animal that is markedly unusual or deformed

Other synonyms of monstrosity include freak, monster.

monstrosity (noun)	lusus naturae (noun)
something hideous or frightful	a person or animal that is markedly unusual or deformed
a person or animal that is markedly unusual or deformed