Exchange blows means to fight physically, but sometimes we need to talk or negotiate instead of fighting. The antonyms for exchange blows could be discuss, negotiate, bargain, mediate, reconcile, and compromise. People can reach an agreement by exchanging ideas and opinions through peaceful dialogue instead of physical aggression. During conflicts, it is necessary to exchange views and ideas to diffuse tension and prevent disputes. Diplomacy is always preferable over violence, and hence people should learn to negotiate and deliberate effectively in different situations. In a nutshell, exchanging words can be much more productive and successful than exchanging blows.