temporary hookup vs connexion

temporary hookup and connexion both are nouns.

Word	Noun	Adjective	Verb	Adverb
temporary hookup	Yes	No	No	No
connexion	Yes	No	No	No

As nouns, connexion is a hypernym of temporary hookup; that is, connexion is a word with a broader meaning than temporary hookup:

Other hypernyms of temporary hookup include connecter, connection, connective, connector, contrivance, lash-up.

temporary hookup (noun)	connexion (noun)
a connection intended to be used for a limited time	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