ostentation vs ostentate

ostentation is a noun but ostentate is not a noun.

Word	Noun	Adjective	Verb	Adverb
ostentation	Yes	No	No	No
ostentate	No	No	Yes	No

ostentation (noun)	ostentate (noun)
pretentious or showy or vulgar display
lack of elegance as a consequence of being pompous and puffed up with vanity
a gaudy outward display

ostentation (verb)	ostentate (verb)
	display proudly; act ostentatiously or pretentiously