59 entries under unpredictable topic. ×
| vacillating(adjective, uncertain, nervous, doubtful, dubious) | |
| fallible(adjective, unreliable, fickle, variable) | |
| inconsistent(adjective, loose, unreliable, variable) | |
| makeshift(adjective, fickle, variable, spontaneous) | |
| weak(adjective, light, slight, thin, uncertain) | |
| deceitful(adjective, false, dishonest, dubious) | |
| false(adjective, light, weak, slight, thin) | |
| furtive(adjective, dishonest, deceitful, dubious) | |
| inaccurate(adjective, careless, loose, sloppy) | |
| indeterminate(adjective, loose, uncertain, nervous, doubtful) | |
| tricky(adjective, false, loose, dishonest, deceitful) | |
| underhand(adjective, bad, wrong, false, dishonest) | |
| unsound(adjective, light, weak, slight, thin) | |
| untrue(adjective, false, dishonest, deceitful) | |
| wavering(adjective, uncertain, nervous, doubtful, hesitant) | |
| bum(loose, unreliable, variable, irresponsible) | |
| deceptive(adjective, false, fickle, variable) | |
| delusive(adjective, fickle, variable, undependable) | |
| erroneous(adjective, fickle, variable, undependable) | |
| fake(adjective, bad, wrong, immoral) |
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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> |