| fiery(adjective, strong, difficult, intense, violent) |
| fleet(prompt, fast, quick, abrupt, rapid) |
| fleeting(adjective, quick, speedy, sudden, hurried) |
| forward(rude, impulsive, aggressive, arrogant, brazen) |
| furiously |
| haste(noun, haste) |
| headstrong(adjective, careless, anxious, worried, thoughtless) |
| heels over head(expression, idiom, haste) |
| holus-bolus |
| immediate(noun, adjective, prompt, fast, quick) |
| indiscreet(adjective, violent, careless, fast, quick) |
| injudicious(adjective, careless, thoughtless, impulsive, reckless) |
| instantaneous(adjective, fast, summary, rapid, swift) |
| lively(prompt, fast, quick, rapid, swift) |
| madly |
| mercurial(fast, rapid, swift) |
| nimble(prompt, fast, quick, summary, rapid) |
| offhand(noun, adjective, thoughtless, candid, spontaneous) |
| plunging(adjective, adverb, violent, fast, quick) |
| precipitantly |