What is another word for pay back?
Pronunciation: [pˈe͡ɪ bˈak] (IPA) 
The phrase "pay back" is commonly used to refer to the act of returning something, such as a favor, money, or a debt. However, there are several synonyms that can be used to convey the same meaning. "Repay" is one such synonym, which implies the act of returning a debt or obligation. "Compensate" and "recompense" refer to making amends for a loss or harm suffered by another. "Remunerate" suggests giving an equivalent or fair reward for services rendered or work done. "Retribute" refers to paying back in kind, often with negative consequences. "Requite" is a more archaic synonym that implies returning a favor, often with gratitude.
