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13
infinite(adjective, complete, vague, unknown, unrestrained)
11
dubious(adjective, open, obscure, rough, uncertain)
11
ill-defined(adjective, rough, loose, uncertain, dim)
10
broad(adjective, soft, careless, common, vague)
10
unsure(adjective, open, rough, certain, uncertain)
9
endless(adjective, complete, unrestrained, immense, infinite)
9
immeasurable(adjective, unrestrained, endless, immense, infinite)
9
unspecified(adjective, rough, strange, uncertain, vague)
8
intangible(adjective, vague, intellectual, unknown, abstract)
8
limitless(adjective, complete, unrestrained, endless, immense)
6
unbounded(adjective, complete, absolute, unrestrained, endless)
6
unknown(adjective, rough, strange, vague, mysterious)
5
illimitable(adjective, complete, unrestrained, endless, immense)
5
incalculable(adjective, complete, doubtful, vague, hesitant)
5
innumerable(adjective, vague, unknown, ambiguous, unfixed)
5
measureless(adjective, complete, unrestrained, endless, immense)
5
wide(adjective, vague, unknown, ambiguous, unfixed)
4
indeterminable(adjective, vague, unknown, ambiguous, unfixed)
4
undependable(adjective, vague, unpredictable, unreliable, unknown)
4
unfathomable(vast, endless, immense, infinite, boundless)
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APASmart Define. (2015). indefinite thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/indefinite/thesaurus/synonyms
ChicagoSmart Define. 2015. "indefinite thesaurus" https://smartdefine.org/indefinite/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, indefinite thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/indefinite/thesaurus/synonyms>.
MLASmart Define. "indefinite thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/indefinite/thesaurus/synonyms>