deflexion vs windage

deflexion and windage both are nouns.

Word	Noun	Adjective	Verb	Adverb
deflexion	Yes	No	No	No
windage	Yes	No	No	No

As nouns, windage is a hyponym of deflexion; that is, windage is a word with a more specific, narrower meaning than deflexion:

Other hyponyms of deflexion include wind deflection, refractiveness, refractivity.

deflexion (noun)	windage (noun)
a turning aside (of your course or attention or concern)	the deflection of a projectile resulting from the effects of wind
the property of being bent or deflected	exposure to the wind (as the exposed part of a vessel's hull which is responsible for wind resistance)
the amount by which a propagating wave is bent	the space between the projectile of a smoothbore gun and the surface of the bore of the gun
the movement of the pointer or pen of a measuring instrument from its zero position	the retarding force of air friction on a moving object