swappair
nounUK /ˈswɒp.peə/
US /ˈswɑːp.per/
Two things that people trade with each other.
I gave Mia my red marble and she gave me her blue one, so we made a swappair.
OTHER MEANINGS
2. A pair of items that are meant to be switched with each other.
The two hats were a swappair, so you could wear either one.
3. Two friends who take turns giving things to each other.
Leo and Sam are a swappair; they share their comics every week.
4. A matching set of two things that can be traded for something else.
The stickers came as a swappair, perfect for trading at school.