| dissolute | |
| double-quick | |
| double-time(hot, quick, speedy) | |
| double time(expression, adjective, fast, quick, swift) | |
| dragon | |
| durable | |
| dynamic(adjective, keen, intense, energetic, lively) | |
| eager(precise, quick, responsive, early, speedy) | |
| eagle-winged | |
| early | |
| easy-moving | |
| exertive(moving, active, effective, running, alive) | |
| expedite | |
| expeditiously | |
| expeditive(adjective, hot, fast, quick, showy) | |
| faithful | |
| feverish(adjective, hasty) | |
| fleet of foot(expression, adjective, idiom, fast, quick) | |
| fleetly | |
| flowing(moving, active, effective, running, alive) |
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| APA | Smart Define. (2016). rapid thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rapid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rapid thesaurus" https://smartdefine.org/rapid/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, rapid thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rapid/thesaurus/synonyms>. |
| MLA | Smart Define. "rapid thesaurus" 1 April 2016. Web. 23 September 2026. <https://smartdefine.org/rapid/thesaurus/synonyms> |