wiper vs windshield wiper

wiper and windshield wiper both are nouns.

Word	Noun	Adjective	Verb	Adverb
wiper	Yes	No	No	No
windshield wiper	Yes	No	No	No

As nouns, wiper and windshield wiper are synonyms defined as:

wiper and windshield wiper: a mechanical device that cleans the windshield

Other synonyms of wiper include windscreen wiper, wiper blade.

wiper (noun)	windshield wiper (noun)
a mechanical device that cleans the windshield	a mechanical device that cleans the windshield
contact consisting of a conducting arm that rotates over a series of fixed contacts and comes to rest on an outlet
a worker who wipes