change-up
change-of-pace
change-of-pace ball
off-speed pitch | a baseball thrown with little velocity when the batter is expecting a fastball |
impingement
encroachment impact | influencing strongly, they resented the impingement of American values on European culture |
speed
speeding
hurrying | changing location rapidly |
| speed skating | competitive skating on speed skates (usually around an oval course) |
| shock impact | the violent interaction of individuals or groups entering into combat, the armies met in the shock of battle |
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 |
| impact printer | a printer that prints by mechanical impacts |
| speed bump | a hindrance to speeding created by a crosswise ridge in the surface of a roadway |
speedometer
speed indicator | a meter fixed to a vehicle that measures and displays its speed |
speed skate
racing skate | an ice skate with a long blade, worn for racing |
speed
swiftness
fastness | a rate (usually rapid) at which something happens, the project advanced with gratifying speed |
| execution speed | (computer science) the speed with which a computational device can execute instructions, measured in MIPS |
| speed trap | a trap arranged on a roadway for catching speeders |
| speed limit | regulation establishing the top speed permitted on a given road |
| impact | the striking of one body against another |
motorcycle cop
motorcycle policeman
speed cop | a policeman who rides a motorcycle (and who checks the speeds of motorists) |
speeder
speed demon | a driver who exceeds the safe speed limit |
| speed freak | addict who habitually uses stimulant drugs (especially amphetamines) |
speedskater
speed skater | an ice-skater who races competitively, usually around an oval course |
impact
wallop | a forceful consequence, a strong effect, the book had an important impact on my thinking, the book packs a wallop |
focal ratio
f number
stop number
speed | the ratio of the focal length to the diameter of a (camera) lens system |
high-speed steel
hot-work steel | an alloy steel that remains hard at a red heat, used to make metalutting tools |
speed
velocity | distance travelled per unit time |
speed of light
light speed
c | the speed at which light travels in a vacuum, the constancy and universality of the speed of light is recognized by defining it to be exactly ,, meters per second |
affect
impact
bear upon
bear on
touch on touch | have an effect upon, Will the new rules affect me? |
accelerate
speed up
speed
quicken | move faster, The car accelerated |
| accelerate speed speed up | cause to move faster, He accelerated the car |
| impact | press or wedge together, pack together |
| speed skate | race on skates |
travel rapidly
speed
hurry
zip | move very fast, The runner zipped past us at breakneck speed |
| speed | travel at an excessive or illegal velocity, I got a ticket for speeding |
c rush
hotfoot
hasten
hie
speed race
pelt along
rush along
cannonball along
bucket along
belt along
step on it | move fast, He rushed down the hall to receive his guests, The cars raced down the street |
| high-speed high-velocity | operating at high speed, a high-speed food processor, a high-velocity shell |