wiper blade vs windscreen wiper

wiper blade and windscreen wiper both are nouns.

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

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

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

Other synonyms of wiper blade include windshield wiper, wiper.

wiper blade (noun)	windscreen wiper (noun)
a mechanical device that cleans the windshield	a mechanical device that cleans the windshield