To respond in kind
return, retaliate, repay, requite; see answer 3, react 1, revenge.
interchange, alternate, give and take; see alternate 1, exchange 2.
"reciprocate." YourDictionary, n.d. Web. 17 August 2018. <http://thesaurus.yourdictionary.com/reciprocate>.
reciprocate. (n.d.). Retrieved August 17th, 2018, from http://thesaurus.yourdictionary.com/reciprocate
To give or take mutually:
To return like for like, especially to return an unfriendly or hostile action with a similar one: