Swopped vs. Swapped: What's the Difference?

Chiefly British Variant of swap.

To trade one thing for another.

Simple past tense and past participle of swop

To exchange (one thing) for another.

An exchange of one thing for another.

A contract in which two parties agree to exchange periodic interest payments, especially when one payment is at a fixed rate and the other varies according to the performance of a reference rate, such as the prime rate.

Simple past tense and past participle of swap