monster vs lusus naturae

monster and lusus naturae both are nouns.

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

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

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

Other synonyms of monster include freak, monstrosity.

monster (noun)	lusus naturae (noun)
(medicine) a grossly malformed and usually nonviable fetus	a person or animal that is markedly unusual or deformed
a cruel wicked and inhuman person
a person or animal that is markedly unusual or deformed
an imaginary creature usually having various human and animal parts
someone that is abnormally large and powerful