connecter vs connexion

connecter and connexion both are nouns.

Word	Noun	Adjective	Verb	Adverb
connecter	Yes	No	No	No
connexion	Yes	No	No	No

As nouns, connecter and connexion are synonyms defined as:

Other synonyms of connecter include connection, connective, connector.

connecter (noun)	connexion (noun)
an instrumentality that connects	the act of bringing two things into contact (especially for communication)
	shifting from one form of transportation to another
	an instrumentality that connects
	the process of bringing ideas or events together in memory or imagination
	a relation between things or events (as in the case of one causing the other or sharing features with it)
	a connecting shape