retaliate (v.)

• alternate
• atone
• avenge
• bandy
• change
• commute
• compensate
• cooperate
• counter
• counterchange
• cover
• exchange
• expiate
• give
• indemnify
• interchange
• logroll
• permute
• reciprocate
• recompense
• rectify
• repay
• requite
• respond
• retort
• return
• revenge
• swap
• switch
• trade
• transpose