vengeance vs payback

vengeance and payback both are nouns.

Word	Noun	Adjective	Verb	Adverb
vengeance	Yes	No	No	No
payback	Yes	No	No	No

As nouns, vengeance and payback are synonyms defined as:

vengeance and payback: the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the next life

Other synonyms of vengeance include retribution.

vengeance (noun)	payback (noun)
the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the next life	the act of taking revenge (harming someone in retaliation for something harmful that they have done) especially in the next life
	financial return or reward (especially returns equal to the initial investment)