Swap is a word that has several synonyms that can be used interchangeably depending on the context. Some of the common synonyms of the word swap include trade, exchange, switch, substitute, replace, interchange, and barter. Trading means exchanging one item for another, while exchange means giving something in return for another item of similar value. Switch is used to change one item for another, whereas substitute means replacing something with something else. Meanwhile, replace is a synonym for swap that means to take the place of something, interchange is used to exchange two things, and barter means to exchange goods or services without using money. All these synonyms can be used in place of swap when the need arises.