早速【さっそく】
at once, immediately, without delay, promptly
速度【そくど】
speed, velocity, pace, rate, velocity
加速【かそく】
acceleration, speeding up
時速【じそく】
speed (per hour)
高速【こうそく】
high-speed, rapid, express, highway, freeway, expressway, motorway
急速【きゅうそく】
rapid (e.g. progress)
高速道路【こうそくどうろ】
highway, freeway, expressway, motorway
減速【げんそく】
deceleration
速やか【すみやか】
quick, speedy, prompt, rapid, swift
風速【ふうそく】
wind speed
速報【そくほう】
news flash, prompt report, bulletin, quick announcement
速さ【はやさ】
speed, velocity, quickness, rapidity, earliness
快速【かいそく】
high speed, rapidity, rapid-service train (not as fast as express), rapid train
速達【そくたつ】
express, special delivery
全速力【ぜんそくりょく】
full speed
速攻【そっこう】
swift attack, quick attack, fast break, right away, without delay, immediately
速記【そっき】
shorthand, stenography
速球【そっきゅう】
fastball
超音速【ちょうおんそく】
supersonic speed
迅速【じんそく】
quick, fast, rapid, swift, prompt, streamlined, expedited, expeditious
