ostentation vs ritz

ostentation and ritz both are nouns.

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

As nouns, ritz is a hyponym of ostentation; that is, ritz is a word with a more specific, narrower meaning than ostentation:

Other hyponyms of ostentation include bluster, bravado, exhibitionism, splurge, pedantry.

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