Swopping, alternatively spelled as swapping, is a common term for exchanging goods or services with someone else. There are various synonyms for this word, including trade, interchange, switch, substitute, interchange, and barter. These terms convey similar meanings but with slight differences. Trade refers to the buying and selling of goods or services. Interchange and switch refer to exchanging one thing for another. Substitute refers to finding an alternative for something. Barter, on the other hand, refers to exchanging goods or services for other goods or services, without any monetary transfer. Regardless of the term used, swopping or swapping is a popular way of getting what one needs without spending cash.