fanfare vs ostentation

fanfare and ostentation both are nouns.

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

As nouns, fanfare and ostentation are synonyms defined as:

Other synonyms of fanfare include flash.

fanfare (noun)	ostentation (noun)
a gaudy outward display	pretentious or showy or vulgar display
(music) a short lively tune played on brass instruments	lack of elegance as a consequence of being pompous and puffed up with vanity
	a gaudy outward display