pay off vs pay up

pay off and pay up both are verbs.

Word	Noun	Adjective	Verb	Adverb
pay off	No	No	Yes	No
pay up	No	No	Yes	No

As verbs, pay up is a hypernym of pay off; that is, pay up is a word with a broader meaning than pay off:

Other hypernyms of pay off include ante up, pay.

pay off (verb)	pay up (verb)
take vengeance on or get even	cancel or discharge a debt
eliminate by paying off (debts)
pay someone with influence in order to receive a favor
yield a profit or result
pay off (loans or promissory notes)
do or give something to somebody in return