97 entries under uncertain topic. ×

12
doubtful(adjective, clear, open, delicate, certain)
10
unclear(adjective, clear, open, certain)
9
equivocal(adjective, clear, open, delicate, certain)
8
ambiguous(adjective, clear, open, delicate, certain)
8
problematic(adjective, clear, delicate, certain)
8
unsure(adjective, clear, open, delicate, certain)
7
dubitable(adjective, clear, certain, doubtful)
7
indecisive(adjective, clear, open, delicate, certain)
7
questionable(adjective, clear, certain, doubtful)
7
undecided(adjective, open, definite, doubtful)
6
dubious(adjective, clear, open, delicate, certain)
6
indefinite(adjective, open, vague, unclear)
5
open(adjective, nervous, unstable, doubtful)
5
suspicious(adjective, nervous, doubtful, unsettled)
5
unsettled(adjective, open, delicate, unstable)
5
unstable(adjective, delicate, nervous, doubtful)
4
clouded(adjective, clear, certain, doubtful)
4
indeterminate(adjective, clear, certain, anxious)
4
indistinct(shaky, vague, unclear, ambiguous)
4
precarious(adjective, unstable, doubtful, shaky)
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APASmart Define. (2015). borderline thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/borderline/thesaurus/synonyms
ChicagoSmart Define. 2015. "borderline thesaurus" https://smartdefine.org/borderline/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, borderline thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/borderline/thesaurus/synonyms>.
MLASmart Define. "borderline thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/borderline/thesaurus/synonyms>