reflexion vs musing

reflexion and musing both are nouns.

Word	Noun	Adjective	Verb	Adverb
reflexion	Yes	No	No	No
musing	Yes	Yes	No	No

As nouns, reflexion and musing are synonyms defined as:

Other synonyms of reflexion include contemplation, reflection, rumination, thoughtfulness.

reflexion (noun)	musing (noun)
the image of something as reflected by a mirror (or other reflective material)	a calm, lengthy, intent consideration
the ability to reflect beams or rays
a likeness in which left and right are reversed
a calm, lengthy, intent consideration
a remark expressing careful consideration
expression without words
the phenomenon of a propagating wave (light or sound) being thrown back from a surface

reflexion (adjective)	musing (adjective)
	deeply or seriously thoughtful