swap

To exchange or give (something) in an exchange (for something else).

To hit, to strike.

To beat the air, or ply the wings, with a sweeping motion or noise; to flap.

To descend or fall; to rush hastily or violently.

An exchange of two comparable things.

A financial derivative in which two parties agree to exchange one stream of cashflow against another stream.

Space available in a swap file for use as auxiliary memory.

"How much swap do you need?"

A blow; a stroke.