voyeur vs peeper

voyeur and peeper both are nouns.

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

As nouns, voyeur and peeper are synonyms defined as:

voyeur and peeper: a viewer who enjoys seeing the sex acts or sex organs of others

Other synonyms of voyeur include Peeping Tom.

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