| innumerable(adjective, vague, unknown, general, unclear) | |
| intangible(adjective, vague, unknown, general, ambiguous) | |
| interminable(adjective, constant, abundant, unrestrained, endless) | |
| lax(unclear, indistinct, indistinguishable) | |
| mysterious | |
| open-ended(adjective, vague, unknown, unfixed, unlimited) | |
| oracular | |
| risky(doubtful, vague, unsure) | |
| suspicious(adjective, uncertain, nervous, doubtful, unsettled) | |
| toneless(adjective, dull, pale, uniform, bland) | |
| uncaused | |
| unclassified(adjective, dull, ordinary, empty, lifeless) | |
| undefinable | |
| unfathomable(adjective, constant, abundant, monotonous, unrestrained) | |
| unintelligible(adjective, obscure, uncertain, vague, unclear) | |
| vacillant | |
| wide(adjective, vague, unknown, general, liberal) | |
| Delphic(nervous, insecure, unsure) | |
| aleatoric | |
| amaranthine(constant, abundant, monotonous, unrestrained, endless) |
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| APA | Smart Define. (2015). indeterminate thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/indeterminate/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indeterminate thesaurus" https://smartdefine.org/indeterminate/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, indeterminate thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/indeterminate/thesaurus/synonyms>. |
| MLA | Smart Define. "indeterminate thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/indeterminate/thesaurus/synonyms> |