windshield vs windscreen

windshield and windscreen both are nouns.

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

As nouns, windshield and windscreen are synonyms defined as:

windshield and windscreen: transparent screen (as of glass) to protect occupants of a vehicle

windshield (noun)	windscreen (noun)
transparent screen (as of glass) to protect occupants of a vehicle	transparent screen (as of glass) to protect occupants of a vehicle