refractive vs refraction

refractive is not a noun while refraction is a noun.

Word	Noun	Adjective	Verb	Adverb
refractive	No	Yes	No	No
refraction	Yes	No	No	No

refractive (noun)	refraction (noun)
	the amount by which a propagating wave is bent
	the change in direction of a propagating wave (light or sound) when passing from one medium to another

refractive (adjective)	refraction (adjective)
of or relating to or capable of refraction
capable of changing the direction (of a light or sound wave)