20 entries under clear topic. ×

14
problematic(adjective, open, difficult, certain)
12
doubtful(adjective, certain, uncertain, dubious)
12
questionable(adjective, certain, uncertain, dubious)
10
dubious(adjective, certain, uncertain, doubtful)
8
uncertain(adjective, certain, doubtful, dubious)
6
dubitable(adjective, obscure, certain, uncertain)
6
iffy(adjective, informal, certain, uncertain)
5
chancy(adjective, certain, uncertain, dubious)
5
in question(adjective, idiom, certain, ambiguous)
4
equivocal(adjective, certain, ambiguous)
4
in doubt(adjective, idiom, certain, ambiguous)
3
ambiguous(adjective, obscure, certain, uncertain)
3
at issue(adjective, idiom, certain, ambiguous)
3
borderline(adjective, certain, ambiguous, debatable)
3
indecisive(adjective, obscure, certain, uncertain)
3
indeterminate(adjective, obscure, certain, uncertain)
3
unsure(adjective, certain, ambiguous)
2
clouded(adjective, certain, ambiguous)
2
inconclusive(adjective, certain, ambiguous)
2
unclear(adjective, hard, obscure, delicate)
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APASmart Define. (2015). problematical thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/problematical/thesaurus/synonyms
ChicagoSmart Define. 2015. "problematical thesaurus" https://smartdefine.org/problematical/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, problematical thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/problematical/thesaurus/synonyms>.
MLASmart Define. "problematical thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/problematical/thesaurus/synonyms>