(physics) A device used to map the atomic structure of a surface by measuring the force acting on the very fine tip of a wire moved over the surface

The air force of the British armed forces

(US, military) A communications unit and their equipment; most often in reference to satellite communications.

(idiomatic) Bring about a situation which necessitates an agent to act, often causing a plan to be executed prematurely.

plural of weak nuclear force

plural of strong nuclear force

(idiomatic) Used to wish someone luck with a difficult endeavor.

plural of ground mobile force

plural of coup de force

A sudden, violent act.