show off vs splurge

show off is not a noun while splurge is a noun.

Word	Noun	Adjective	Verb	Adverb
show off	No	No	Yes	No
splurge	Yes	No	Yes	No

As verbs, splurge is a hyponym of show off; that is, splurge is a word with a more specific, narrower meaning than show off:

Other hyponyms of show off include flex.

show off (noun)	splurge (noun)
	any act of immoderate indulgence
	an ostentatious display (of effort or extravagance etc.)

show off (verb)	splurge (verb)
display proudly; act ostentatiously or pretentiously	be showy or ostentatious
	indulge oneself