piss-up vs bout

piss-up and bout both are nouns.

Word	Noun	Adjective	Verb	Adverb
piss-up	Yes	No	No	No
bout	Yes	No	No	No

As nouns, bout is a hypernym of piss-up; that is, bout is a word with a broader meaning than piss-up:

Other hypernyms of piss-up include binge, bust, tear.

piss-up (noun)	bout (noun)
vulgar expression for a bout of heavy drinking	an occasion for excessive eating or drinking
	a contest or fight (especially between boxers or wrestlers)
	(sports) a division of a game during which one team is on the offensive
	a period of illness