33 entries under light topic. ×
| ephemeral(adjective, weak, unreliable, brief) | |
| insubstantial(adjective, weak, slight, short) | |
| fanciful(adjective, weak, slight, imaginary) | |
| fragile(weak, slight, imaginary, flimsy) | |
| frail(weak, slight, imaginary, flimsy) | |
| infirm(adjective, weak, slight, imaginary) | |
| weak(adjective, slight, thin, uncertain) | |
| false(adjective, weak, slight, thin) | |
| idle(weak, moving, slight, unsettled) | |
| unsound(adjective, weak, slight, thin) | |
| aerial(weak, slight, imaginary, flimsy) | |
| airy(weak, slight, imaginary, flimsy) | |
| chimerical(weak, slight, imaginary, flimsy) | |
| decrepit(weak, slight, imaginary, flimsy) | |
| feeble(weak, slight, imaginary, flimsy) | |
| flimsy(weak, slight, imaginary) | |
| illusory(weak, slight, imaginary, flimsy) | |
| imaginary(weak, slight, flimsy) | |
| immaterial(weak, slight, imaginary, flimsy) | |
| imponderable(weak, slight, imaginary, flimsy) |
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Fly-by-night on
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| APA | Smart Define. (2016). fly-by-night thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/fly-by-night/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fly-by-night thesaurus" https://smartdefine.org/fly-by-night/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, fly-by-night thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/fly-by-night/thesaurus/synonyms>. |
| MLA | Smart Define. "fly-by-night thesaurus" 26 February 2016. Web. 28 September 2026. <https://smartdefine.org/fly-by-night/thesaurus/synonyms> |