assignation vs rendezvous

assignation and rendezvous both are nouns.

Word	Noun	Adjective	Verb	Adverb
assignation	Yes	No	No	No
rendezvous	Yes	No	Yes	No

As nouns, rendezvous is a hypernym of assignation; that is, rendezvous is a word with a broader meaning than assignation:

assignation (noun)	rendezvous (noun)
a secret rendezvous (especially between lovers)	a meeting planned at a certain time and place
the act of distributing by allotting or apportioning; distribution according to a plan	a date; usually with a member of the opposite sex
	a place where people meet

assignation (verb)	rendezvous (verb)
	meet at a rendezvous