16 entries under doubtful topic. ×

9
dubious(adjective, clear, obscure, certain, uncertain)
7
dubitable(adjective, clear, obscure, certain, uncertain)
6
problematic(adjective, clear, obscure, certain, uncertain)
6
questionable(adjective, clear, weak, obscure, certain)
4
ambiguous(adjective, clear, obscure, certain, uncertain)
4
uncertain(adjective, clear, weak, obscure, certain)
3
in doubt(adjective, obscure, uncertain, anxious)
3
unsure(adjective, clear, obscure, certain, uncertain)
2
borderline(adjective, clear, certain, uncertain, anxious)
2
equivocal(adjective, clear, obscure, certain, uncertain)
2
inconclusive(adjective, clear, obscure, certain, uncertain)
2
indecisive(adjective, clear, obscure, certain, uncertain)
1
chancy(adjective, clear, certain, uncertain, anxious)
1
clouded(adjective, clear, obscure, certain, uncertain)
1
indeterminate(adjective, clear, obscure, certain, uncertain)
1
unclear(adjective, clear, obscure, certain, uncertain)
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APASmart Define. (2015). in question thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/in_question/thesaurus/synonyms
ChicagoSmart Define. 2015. "in question thesaurus" https://smartdefine.org/in_question/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, in question thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/in_question/thesaurus/synonyms>.
MLASmart Define. "in question thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/in_question/thesaurus/synonyms>