1
unheard of(verb, expression, phrasal verb, strange, indefinite)
1
unknowable
1
unnamed(adjective, strange, indefinite, unidentified)
1
unnoted(strange, new, remote, indefinite, unidentified)
1
unplumbed
1
unproved
1
unrecognized(strange, new, remote, mysterious, indefinite)
1
unrenowned(strange, new, remote, mysterious, indefinite)
1
unsettled
1
unsubstantiated
1
unsung(adjective, strange, new, remote, indefinite)
1
unsupported
1
unsuspected
1
unsustained
1
untested
1
untold(strange, new, uncertainty, remote, mysterious)
1
untouched
1
untried
1
unverified
0
illegible
11 years ago|1.2k views|share |citing 
APASmart Define. (2015). unascertained thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unascertained/thesaurus/synonyms
ChicagoSmart Define. 2015. "unascertained thesaurus" https://smartdefine.org/unascertained/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unascertained thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unascertained/thesaurus/synonyms>.
MLASmart Define. "unascertained thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unascertained/thesaurus/synonyms>