52 entries under questionable topic. ×
| doubtful(adjective, clear, open, delicate, certain) | |
| unclear(adjective, clear, open, certain, uncertain) | |
| equivocal(adjective, clear, open, delicate, certain) | |
| ambiguous(adjective, clear, open, delicate, certain) | |
| problematic(adjective, clear, delicate, certain, uncertain) | |
| uncertain(adjective, clear, open, delicate, certain) | |
| unsure(adjective, clear, open, delicate, certain) | |
| dubitable(adjective, clear, certain, uncertain, doubtful) | |
| indecisive(adjective, clear, open, delicate, certain) | |
| undecided(adjective, open, uncertain, definite, doubtful) | |
| dubious(adjective, clear, open, delicate, certain) | |
| indefinite(adjective, open, uncertain, vague, unclear) | |
| open(adjective, uncertain, nervous, unstable, doubtful) | |
| suspicious(adjective, uncertain, nervous, doubtful, unsettled) | |
| unsettled(adjective, open, delicate, uncertain, unstable) | |
| unstable(adjective, delicate, uncertain, nervous, doubtful) | |
| clouded(adjective, clear, certain, uncertain, doubtful) | |
| indeterminate(adjective, clear, certain, uncertain, anxious) | |
| indistinct(uncertain, shaky, vague, unclear, ambiguous) | |
| precarious(adjective, uncertain, unstable, doubtful, shaky) |
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| APA | Smart Define. (2015). borderline thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/borderline/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "borderline thesaurus" https://smartdefine.org/borderline/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, borderline thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/borderline/thesaurus/synonyms>. |
| MLA | Smart Define. "borderline thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/borderline/thesaurus/synonyms> |