wiper vs windscreen wiper

wiper and windscreen wiper both are nouns.

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

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

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

Other synonyms of wiper include windshield wiper, wiper blade.

wiper (noun)	windscreen 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