Translation guide
The front window of a vehicle, called a windshield in American English. In Japanese, the most common term is フロントガラス, but other terms exist depending on context.
windscreen
Most common term for car windscreen/windshield.
The glass at the front of a car, bus, or other vehicle.
フロントガラス is the everyday word for a car's front window. 風防 is more technical and often refers to motorcycle or aircraft windscreens. Using 風防 for a car can sound old-fashioned or overly formal.
The car's windscreen broke.
The most common and general term for a windscreen/windshield. Used for cars, trucks, and other vehicles.
The windscreen has a crack.
The windscreen is fogged up.
Literally 'front glass'. Used in technical or formal contexts, such as vehicle specifications or manuals.
The front glass of this car is tempered glass.
Literally 'windshield'. Used for motorcycles, aircraft, or in older/formal contexts. Not common for cars.
I replaced the motorcycle windscreen.
Direct loanword from English 'windshield'. Sometimes used in car enthusiast circles or imported car contexts, but フロントガラス is much more common.
I applied a water-repellent treatment to the windshield.
飛行機の風防は丈夫だ。
The aircraft's windscreen is sturdy.