flaunt vs ostentate

flaunt is a noun but ostentate is not a noun.

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

As verbs, flaunt and ostentate are synonyms defined as:

flaunt and ostentate: display proudly; act ostentatiously or pretentiously

Other synonyms of flaunt include flash, show off, swank.

flaunt (noun)	ostentate (noun)
the act of displaying something ostentatiously

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