Peeping Tom vs looker

Peeping Tom and looker both are nouns.

Word	Noun	Adjective	Verb	Adverb
Peeping Tom	Yes	No	No	No
looker	Yes	No	No	No

As nouns, looker is a hypernym of Peeping Tom; that is, looker is a word with a broader meaning than Peeping Tom:

Peeping Tom: a viewer who enjoys seeing the sex acts or sex organs of others
looker: a close observer; someone who looks at something (such as an exhibition of some kind)

Other hypernyms of Peeping Tom include spectator, viewer, watcher, witness.

Peeping Tom (noun)	looker (noun)
a viewer who enjoys seeing the sex acts or sex organs of others	a very attractive or seductive looking woman
	a close observer; someone who looks at something (such as an exhibition of some kind)