looker vs viewer

looker and viewer both are nouns.

Word	Noun	Adjective	Verb	Adverb
looker	Yes	No	No	No
viewer	Yes	No	No	No

As nouns, looker and viewer are synonyms defined as:

looker and viewer: a close observer; someone who looks at something (such as an exhibition of some kind)

Other synonyms of looker include spectator, watcher, witness.

looker (noun)	viewer (noun)
a very attractive or seductive looking woman	an optical device for viewing photographic transparencies
a close observer; someone who looks at something (such as an exhibition of some kind)	a close observer; someone who looks at something (such as an exhibition of some kind)