pay off vs get back

pay off and get back both are verbs.

Word	Noun	Adjective	Verb	Adverb
pay off	No	No	Yes	No
get back	No	No	Yes	No

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

Other hypernyms of pay off include get even.

pay off (verb)	get back (verb)
take vengeance on or get even	take revenge or even out a score
eliminate by paying off (debts)	recover something or somebody that appeared to be lost
pay someone with influence in order to receive a favor	get one's revenge for a wrong or an injury
yield a profit or result
pay off (loans or promissory notes)
do or give something to somebody in return