| not to be trusted(adjective, unreliable, shady) | |
| open(adjective, uncertain, nervous, doubtful, hesitant) | |
| overnight | |
| perplexed(uncertain, doubtful, unsure) | |
| place | |
| precarious(adjective, unreliable, insecure, treacherous, incalculable) | |
| pregnable(adjective, unreliable, insecure, treacherous, incalculable) | |
| pro tem | |
| pro tempore | |
| problematic(adjective, uncertain, nervous, doubtful, hesitant) | |
| provisionary | |
| provisory | |
| quickly | |
| random(adjective, capricious) | |
| recluse(exile, outlaw, outcast) | |
| reluctant(uncertain, doubtful, unsure) | |
| restless | |
| runagate(exile, outlaw, outcast) | |
| sail | |
| sharp(adjective, bad, wrong, false, dishonest) |
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| APA | Smart Define. (2016). fly-by-night thesaurus. Retrieved September 29, 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 29, 2026). |
| Harvard | Smart Define 2016, fly-by-night thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/fly-by-night/thesaurus/synonyms>. |
| MLA | Smart Define. "fly-by-night thesaurus" 26 February 2016. Web. 29 September 2026. <https://smartdefine.org/fly-by-night/thesaurus/synonyms> |