switch

An exchange or a swap, especially one done secretly.

A transference or shift, as of opinion or attention.

A device used to break or open an electric circuit or to divert current from one conductor to another.

A device consisting of two sections of railroad track and accompanying apparatus used to transfer rolling stock from one track to another.

A slender flexible rod, stick, or twig, especially one used for whipping.

The bushy tip of the tail of certain animals.

A thick strand of real or synthetic hair used as part of a coiffure.