peeper vs animal

peeper and animal both are nouns.

Word	Noun	Adjective	Verb	Adverb
peeper	Yes	No	No	No
animal	Yes	Yes	No	No

As nouns, animal is a hypernym of peeper; that is, animal is a word with a broader meaning than peeper:

Other hypernyms of peeper include animate being, beast, brute, creature, fauna.

peeper (noun)	animal (noun)
an animal that makes short high-pitched sounds	a living organism characterized by voluntary movement
an informal term referring to the eye
a viewer who enjoys seeing the sex acts or sex organs of others

peeper (adjective)	animal (adjective)
	marked by the appetites and passions of the body