| interim | |
| irresponsive(adjective, madcap, feckless, unaccountable) | |
| jib | |
| kaleidoscopic | |
| lacking(adjective, uncertain, nervous, doubtful, shaky) | |
| lazy(adjective, madcap, feckless, unaccountable, irresponsive) | |
| limited | |
| little | |
| loose(careless, immoral, thoughtless, sloppy, unreliable) | |
| madcap(adjective, feckless, unaccountable, irresponsive) | |
| make-do | |
| meteoric | |
| minute | |
| mistrustful(adjective, uncertain, nervous, doubtful, shaky) | |
| moot(uncertain, doubtful, unsure) | |
| mootable(uncertain, doubtful, unsure) | |
| moving | |
| negligent(careless, loose, sloppy, reckless, inexact) | |
| nonpermanent | |
| not to be relied upon(adjective, unreliable, shady) |
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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> |