| quick(adjective, prompt, fast, summary, speedy) |
| immediate(adjective, time, direct, fast, precise) |
| instant(adjective, time, direct, prompt, precise) |
| hasty(adjective, fast, impulsive, summary, swift) |
| prompt(adjective, direct, fast, quick, responsive) |
| fast(adjective, direct, prompt, quick, immediate) |
| rapid(adjective, fast, precise, responsive, early) |
| swift(adjective, fast, precise, responsive, summary) |
| abrupt(adjective, direct, fast, impulsive, summary) |
| momentary(adjective, brief, immediate, transient, instantaneity) |
| sudden(adjective, fast, summary, swift, immediate) |
| brisk(adjective, fast, precise, responsive, early) |
| speedy(adjective, direct, fast, precise, responsive) |
| brief(adjective, fast, short, swift, immediate) |
| spontaneous(adjective, impulsive, immediate, sudden) |
| transitory(adjective, immediate, transient, transientness) |
| cursory(adjective, fast, rapid, swift, instant) |
| fleeting(adjective, sudden, transient, transientness) |
| hurried(adjective, fast, summary, rapid, swift) |
| transient(adjective, transient, transientness) |