envoi vs envoy

envoi and envoy both are nouns.

Word	Noun	Adjective	Verb	Adverb
envoi	Yes	No	No	No
envoy	Yes	No	No	No

As nouns, envoi and envoy are synonyms defined as:

envoi (noun)	envoy (noun)
a brief stanza concluding certain forms of poetry	a brief stanza concluding certain forms of poetry
	a diplomat having less authority than an ambassador
	someone sent on a mission to represent the interests of someone else