- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
| ethereal | |
| expansive(impulsive, unpredictable, explosive) | |
| experimental | |
| expiring | |
| explosive(impulsive, unpredictable) | |
| false(light, weak, slight, pretentious, imaginary) | |
| fanciful(light, weak, slight, imaginary, flimsy) | |
| feeble(light, weak, slight, imaginary, flimsy) | |
| flash | |
| flash in the pan(expression, idiom, brief, transitory, short-lived) | |
| flasher | |
| fleeter | |
| fleetest | |
| fleets | |
| flighty(impulsive, unpredictable, explosive) | |
| flimsy(light, weak, slight, imaginary) | |
| flippant(impulsive, unpredictable, explosive) | |
| freelance | |
| frivolous(impulsive, unpredictable, explosive) | |
| fungal |
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| APA | Smart Define. (2016). ephemeral thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/ephemeral/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "ephemeral thesaurus" https://smartdefine.org/ephemeral/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, ephemeral thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/ephemeral/thesaurus/synonyms>. |
| MLA | Smart Define. "ephemeral thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/ephemeral/thesaurus/synonyms> |