wind deflection vs windage

wind deflection and windage both are nouns.

Word	Noun	Adjective	Verb	Adverb
wind deflection	Yes	No	No	No
windage	Yes	No	No	No

As nouns, wind deflection and windage are synonyms defined as:

wind deflection and windage: the deflection of a projectile resulting from the effects of wind

wind deflection (noun)	windage (noun)
the deflection of a projectile resulting from the effects of wind	the deflection of a projectile resulting from the effects of wind
	exposure to the wind (as the exposed part of a vessel's hull which is responsible for wind resistance)
	the space between the projectile of a smoothbore gun and the surface of the bore of the gun
	the retarding force of air friction on a moving object