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undisclosed
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unexplained
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unexposed
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unfamiliar
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unidentified
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universal
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unknown
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unlimited
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unmeasurable
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unmeasured
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unnumbered
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unperceived
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unrevealed
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unsuspected
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untold
11 years ago|1.3k views|share |citing 
APASmart Define. (2015). unplumbed thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unplumbed/thesaurus/synonyms
ChicagoSmart Define. 2015. "unplumbed thesaurus" https://smartdefine.org/unplumbed/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unplumbed thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unplumbed/thesaurus/synonyms>.
MLASmart Define. "unplumbed thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unplumbed/thesaurus/synonyms>