| noun | control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit |
| noun | an event in which one thing is substituted for another “the replacement of lost blood by a transfusion of donor blood” |
| noun | hairpiece consisting of a tress of false hair; used by women to give shape to a coiffure |
| noun | railroad track having two movable rails and necessary connections; used to turn a train from one track to another or to store rolling stock |
| noun | a flexible implement used as an instrument of punishment |
| noun | a basketball maneuver; two defensive players shift assignments so that each guards the player usually guarded by the other |
| noun | the act of changing one thing or position for another “his switch on abortion cost him the election” |
| verb | change over, change around, as to a new order or sequence |
| verb | exchange or give (something) in exchange for |
| verb | lay aside, abandon, or leave for another “switch to a different brand of beer” |
| verb | make a shift in or exchange of “First Joe led; then we switched” |
| verb | cause to go on or to be engaged or set in operation “switch on the light” |
| verb | flog with or as if with a flexible rod |
| verb | reverse (a direction, attitude, or course of action) |
| switch | verb | cause to go on or to be engaged or set in operation |
| substitute | verb | be a substitute |
| replace | verb | substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected) |
| shift | verb | move from one setting or context to another |
| switch | noun | an event in which one thing is substituted for another |
| exchange | noun | the act of putting one thing or person in the place of another: |
| trade | noun | an equal exchange |
| swap | noun | an equal exchange |
| swop | noun | an equal exchange |
| switching | noun | the act of changing one thing or position for another |
| shift | noun | an event in which something is displaced without rotation |
| switcher | noun | a person who administers punishment by wielding a switch or whip |
| tack | noun | (nautical) the act of changing tack |
| flip-flop | noun | a decision to reverse an earlier decision |