deflexion vs refraction

deflexion and refraction both are nouns.

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

As nouns, deflexion and refraction are synonyms defined as:

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

Other synonyms of deflexion include deflection.

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