windscreen vs windshield

windscreen and windshield both are nouns.

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

As nouns, windscreen and windshield are synonyms defined as:

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

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