ostentation vs splurge

ostentation and splurge both are nouns.

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

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

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

ostentation (noun)	splurge (noun)
pretentious or showy or vulgar display	any act of immoderate indulgence
lack of elegance as a consequence of being pompous and puffed up with vanity	an ostentatious display (of effort or extravagance etc.)
a gaudy outward display

ostentation (verb)	splurge (verb)
	be showy or ostentatious
	indulge oneself