patina vs patinate

patina is a noun but patinate is not a noun.

Word	Noun	Adjective	Verb	Adverb
patina	Yes	No	No	No
patinate	No	No	Yes	No

patina (noun)	patinate (noun)
a fine coating of oxide (produced by oxidation over a long period of time) on the surface of a metal (particularly copper)
a gloss or sheen on wooden furniture produced by age, polishing, or handling
an acquired change in the appearance of something (other than metal or wood)

patina (verb)	patinate (verb)
	coat with a patina