viewfinder vs finder

viewfinder and finder both are nouns.

Word	Noun	Adjective	Verb	Adverb
viewfinder	Yes	No	No	No
finder	Yes	No	No	No

As nouns, viewfinder and finder are synonyms defined as:

viewfinder and finder: optical device that helps a user to find the target of interest

Other synonyms of viewfinder include view finder.

viewfinder (noun)	finder (noun)
optical device that helps a user to find the target of interest	optical device that helps a user to find the target of interest
	someone who is the first to observe something
	someone who comes upon something after searching