refraction vs deflexion

refraction and deflexion both are nouns.

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

As nouns, refraction and deflexion are synonyms defined as:

refraction and deflexion: the amount by which a propagating wave is bent

Other synonyms of refraction include deflection.

refraction (noun)	deflexion (noun)
the amount by which a propagating wave is bent	a turning aside (of your course or attention or concern)
the change in direction of a propagating wave (light or sound) when passing from one medium to another	the property of being bent or deflected
	the amount by which a propagating wave is bent
	the movement of the pointer or pen of a measuring instrument from its zero position