1. (noun) speed, velocity
distance travelled per unit time
Synonyms: velocity, speeding, amphetamine, fastness, pep pill, speed, swiftness, focal ratio, upper, hurrying, f number, stop number
2. (noun) speed, swiftness, fastness
a rate (usually rapid) at which something happens
Synonyms: stronghold, swiftness, stop number, secureness, fixture, speeding, upper, velocity, speed, f number, fixity, pep pill, fixedness, focal ratio, amphetamine, hurrying, fastness
3. (noun) speed, speeding, hurrying
changing location rapidly
Synonyms: velocity, speeding, amphetamine, fastness, pep pill, speed, swiftness, focal ratio, upper, hurrying, f number, stop number
4. (noun) focal ratio, f number, stop number, speed
the ratio of the focal length to the diameter of a (camera) lens system
Synonyms: speeding, amphetamine, fastness, pep pill, speed, hurrying, swiftness, focal ratio, upper, velocity, f number, stop number
5. (verb) amphetamine, pep pill, upper, speed
a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
Synonyms: speeding, swiftness, fastness, upper, pep pill, speed, hurrying, upper berth, focal ratio, amphetamine, velocity, f number, stop number
6. (verb) rush, hotfoot, hasten, hie, speed, race, pelt along, rush along, cannonball along, bucket along, belt along, step on it
move fast
Synonyms: run, hotfoot, zip, travel rapidly, cannonball along, quicken, bucket along, race, hurry, accelerate, rush along, hie, hasten, belt along, speed, expedite, look sharp, induce, pelt along, stimulate, festinate, speed up, step on it, rush
7. (verb) accelerate, speed up, speed, quicken
move faster
Synonyms: recreate, hotfoot, zip, travel rapidly, quicken, cannonball along, vivify, whet, bucket along, race, hurry, rush along, hie, hasten, belt along, speed, accelerate, renovate, revivify, reanimate, pelt along, animate, repair, revive, invigorate, speed up, step on it, rush
8. (verb) travel rapidly, speed, hurry, zip
move very fast
Synonyms: zipper, hotfoot, zip, travel rapidly, cannonball along, zip up, bucket along, race, hurry, rush along, hie, hasten, belt along, speed, accelerate, look sharp, pelt along, quicken, festinate, speed up, step on it, rush
9. (verb) speed
travel at an excessive or illegal velocity
Synonyms: hotfoot, zip, travel rapidly, quicken, cannonball along, bucket along, race, hurry, rush along, hie, hasten, belt along, accelerate, pelt along, speed up, step on it, rush
10. (verb) accelerate, speed, speed up
cause to move faster
Synonyms: hotfoot, zip, travel rapidly, quicken, cannonball along, bucket along, race, hurry, rush along, hie, hasten, belt along, speed, accelerate, pelt along, speed up, step on it, rush
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Synonyms and Antonyms of speed 
