splurge vs ostentation

splurge and ostentation both are nouns.

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

As nouns, ostentation is a hypernym of splurge; that is, ostentation is a word with a broader meaning than splurge:

Other hypernyms of splurge include fanfare, flash.

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

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