Against that (or those); in opposition to that; in return for that. Obsolete.

†in change: in exchange. Now archaic and rare.

spec. With reference to the ratification of a formal document: by way of exchange; mutually. Obsolete.

By way of interchange of two (or more) things, each taking the place of the (or an) other; hence of the use of words: synonymously, indifferently…

In the context of responding or reacting to someone or something (esp. in retaliation): with something similar; in the same way. Frequently in to…

Interchangeably, as equivalents, synonymously.