Verb

1. refund, return, repay, give back, pay

usage: pay back; "Please refund me my money"

2. requite, repay, give

usage: make repayment for or return something

3. reward, repay, pay back, act, move

usage: act or give recompense in recognition of someone's behavior or actions

4. retort, come back, repay, return, riposte, rejoin, answer, reply, respond

usage: answer back

See also: repay (Dictionary)