157 entries under dubious topic. ×
| kooky(extraordinary, unusual, strange, amazing) | |
| lamebrained(extraordinary, amazing, astonishing, incredible) | |
| misleading(adjective, uncertain, faint, vague) | |
| not likely(expression, unreasonable, unlikely, flimsy) | |
| occult(dark, uncertain, mysterious) | |
| oracular(dark, uncertain, mysterious) | |
| outside chance(expression, unlikely, implausible, improbable) | |
| past belief(expression, extraordinary, amazing, astonishing) | |
| phony(extraordinary, amazing, suspect, shady) | |
| reaching(extraordinary, amazing, suspect, astonishing) | |
| scatterbrained(extraordinary, amazing, astonishing, incredible) | |
| screwy(extraordinary, amazing, astonishing, incredible) | |
| suspected(adjective, uncertain, suspicious) | |
| too much(expression, extraordinary, unreasonable, astonishing) | |
| touch and go(expression, adjective, idiom, delicate, uncertain) | |
| uncommon(unusual, strange, suspect, shady) | |
| unheard-of | |
| untoward | |
| up for discussion(expression, adjective, idiom, uncertain, unsettled) | |
| uptight(adjective, uncertain, anxious, nervous, careful) |
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| APA | Smart Define. (2016). doubtful thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/doubtful/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, doubtful thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/doubtful/thesaurus/synonyms>. |
| MLA | Smart Define. "doubtful thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/doubtful/thesaurus/synonyms> |