Synonyms|278Antonyms|36|Broader|0Narrower|0Related|261
2
far-out
2
freakish
2
inglorious
2
little known(expression, strange, new, remote, indefinite)
2
marvelous(adjective, excellent, extraordinary, unusual, strange)
2
mind-boggling(adjective, extraordinary, strange, unbelievable, implausible)
2
mysterious(strange, indefinite, unidentified)
2
offensive
2
particular
2
puzzling(strange, unfathomable)
2
quaint
2
sensational(adjective, pleasant, superb, marvelous, fantastic)
2
special
2
staggering(adjective, pleasant, extraordinary, strange, superb)
2
stupendous(adjective, pleasant, unusual, strange, superb)
2
surprising(adjective, unusual, strange, superb, exceptional)
2
unapprehended(strange, new, remote, indefinite, unidentified)
2
unascertained(strange, new, remote, indefinite, unidentified)
2
uncelebrated(strange, new, remote, unknown, indefinite)
2
unconventional
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APASmart Define. (2015). unheard-of thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unheard-of/thesaurus/synonyms
ChicagoSmart Define. 2015. "unheard-of thesaurus" https://smartdefine.org/unheard-of/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unheard-of thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unheard-of/thesaurus/synonyms>.
MLASmart Define. "unheard-of thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/unheard-of/thesaurus/synonyms>