That operates, moves or takes place at a greater than normal speed.

Alternative spelling of Godspeed

A form of speed bump, often one of a series, that allows larger (especially emergency) vehicles to straddle them without slowing down

Alternative spelling of speed dating

(science fiction) A hypothetical, extremely rapid, speed, resulting from entering a separate dimension, termed hyperspace; much faster than the speed of light.

(computing) The rate, measured in hertz, at which a processor performs its fundamental operations.

A device that limits vehicle speed.

plural of speed freak

Alternative spelling of speedfreak

(photography) The duration of time for which the shutter of a camera remains open when exposing photographic film or other photosensitive material to light for the purpose of recording an image.