| briefly | |
| brisk | |
| brittle | |
| burst | |
| chancy(uncertain, doubtful, unsure) | |
| conniving(adjective, false, dishonest, deceitful, dubious) | |
| convertible | |
| corruptible | |
| crooked(adjective, bad, wrong, false, dishonest) | |
| dalliance | |
| debatable(uncertain, doubtful, unsure) | |
| deceitful(adjective, false, dishonest, dubious, unpredictable) | |
| derelict(exile, outlaw, outcast) | |
| devious(adjective, false, dishonest, deceitful, dubious) | |
| dickey(adjective, unreliable, insecure, treacherous, incalculable) | |
| dicky(adjective, unreliable, insecure, treacherous, incalculable) | |
| diffident(uncertain, nervous, doubtful, insecure, unsure) | |
| dillydallying(adjective, irresolute) | |
| displaced person(expression, exile, outlaw, outcast) | |
| disputable(uncertain, doubtful, unsure) |
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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> |