Synonyms for Unheard-of:

• adj.

  •exceptional (adjective)
  • abnormal,
  • extraordinary,
  • odd,
  • peculiar,
  • phenomenal,
  • remarkable,
  • special,
  • strange,
  • uncommon,
  • unimaginable,
  • unique,
  • unthinkable,
  • uncustomary,
  • unordinary.
  •extraordinary (adjective)
  • amazing,
  • bizarre,
  • curious,
  • fantastic,
  • incredible,
  • marvelous,
  • outstanding,
  • particular,
  • stupendous,
  • surprising,
  • unwonted,
  • weird.
  •inconceivable (adjective)
  • impossible,
  • incomprehensible,
  • mind-boggling,
  • staggering,
  • unknowable.
  •irregular (adjective)
  • exceptional.
  •mind-boggling (adjective)
  • unimaginable.
  •nameless (adjective)
  • incognito,
  • inconspicuous,
  • obscure,
  • pseudonymous,
  • undistinguished,
  • unnamed,
  • unnoted,
  • Innominate,
  • uncelebrated,
  • unfamed.
  •obscure (adjective)
  • enigmatic,
  • humble,
  • inglorious,
  • lowly,
  • minor,
  • mysterious,
  • undisclosed,
  • unimportant,
  • unhonored.
  •outlandish (adjective)
  • alien,
  • barbarous,
  • eccentric,
  • exotic,
  • far-out,
  • foreign,
  • freakish,
  • grotesque,
  • outrageous,
  • quaint,
  • unconventional,
  • unorthodox,
  • queer.
  •unaccountable (adjective)
  • astonishing,
  • inexplicable,
  • puzzling.
  •uncanny (adjective)
  • astounding,
  • miraculous,
  • prodigious,
  • unearthly.
  •uncharted (adjective)
  • unexplored,
  • unidentified.
  •undetected (adjective)
  • little-known.
  •unheard-of (adjective)
  • exceptional,
  • inconceivable,
  • nameless,
  • new,
  • novel,
  • outlandish,
  • preposterous,
  • rare,
  • shocking,
  • singular,
  • unbelievable,
  • undiscovered,
  • unfamiliar,
  • unknown,
  • unlikely,
  • unprecedented,
  • unsung,
  • unusual,
  • little-known,
  • Unrenowned.
  •unknown (adjective)
  • uncharted,
  • unexplained,
  • unperceived,
  • unrecognized,
  • unrevealed,
  • Unapprehended,
  • Unascertained,
  • Unrenowned.
  •unusual (adjective)
  • uncommon.

• n.

  •
  • exotic,
  • odd,
  • offbeat,
  • remarkable,
  • special,
  • surprising.
  •
  • nameless,
  • obscure.
  •unheard-of (noun)
  • unknown.
  •unprecedented (noun)
  • new,
  • unique,
  • unusual.

• Other synonyms:

  •
  • unlikely.
  •
  • nameless.
  •
  • obscure.
  •inconceivable
  • unimaginable.
  •Other relevant words:
  • able,
  • abnormal,
  • absurd,
  • alien,
  • amazing,
  • anonymous,
  • astonishing,
  • astounding,
  • barbarous,
  • beguiling,
  • bewildering,
  • bizarre,
  • breakaway,
  • camp,
  • curious,
  • different,
  • disgraceful,
  • distinctive,
  • eccentric,
  • enigmatic,
  • exceptional,
  • exotic,
  • extraordinary,
  • extreme,
  • fabulous,
  • fantastic,
  • fantastical,
  • far-out,
  • fascinating,
  • foreign,
  • freakish,
  • funny,
  • grotesque,
  • humble,
  • impossible,
  • incalculable,
  • incognito,
  • incognizable,
  • incomprehensible,
  • inconceivable,
  • inconsequential,
  • inconspicuous,
  • incredible,
  • inexplicable,
  • inglorious,
  • insignificant,
  • kinky,
  • kooky,
  • lowly,
  • marvellous,
  • marvelous,
  • mean,
  • mind-blowing,
  • mind-boggling,
  • minor,
  • miraculous,
  • mysterious,
  • nameless,
  • new,
  • novel,
  • obscure,
  • odd,
  • offbeat,
  • offensive,
  • original,
  • out-of-the-way,
  • outlandish,
  • outrageous,
  • outstanding,
  • overwhelming,
  • particular,
  • peculiar,
  • personal,
  • phenomenal,
  • preposterous,
  • prodigious,
  • pseudonymous,
  • puzzling,
  • quaint,
  • rare,
  • recherche,
  • remarkable,
  • rum,
  • sealed,
  • sensational,
  • shocking,
  • signal,
  • singular,
  • special,
  • staggering,
  • strange,
  • striking,
  • stunning,
  • stupendous,
  • sui generis,
  • surprising,
  • unaccountable,
  • unapparent,
  • unbeknown,
  • unbelievable,
  • uncanny,
  • uncharted,
  • unclassified,
  • uncommon,
  • unconventional,
  • undetected,
  • undisclosed,
  • undiscoverable,
  • undiscovered,
  • undistinguished,
  • undreamed of,
  • undreamt of,
  • unearthly,
  • unexampled,
  • unexpected,
  • unexplained,
  • unexplored,
  • unfamiliar,
  • unfathomed,
  • ungodly,
  • unheard,
  • unidentified,
  • unimaginable,
  • unimagined,
  • unimportant,
  • unique,
  • unknowable,
  • unlikely,
  • unnamed,
  • unnoted,
  • unnoticed,
  • unorthodox,
  • unparalleled,
  • unperceived,
  • unplumbed,
  • unpopular,
  • unprecedented,
  • unreasonable,
  • unrecognized,
  • unremarked,
  • unrevealed,
  • unsung,
  • unsuspected,
  • unthinkable,
  • unthought-of,
  • untouched,
  • unusual,
  • unwonted,
  • weird,
  • wonderful,
  • wondrous,
  • Innominate,
  • Renownless,
  • uncustomary,
  • unexposed,
  • unhonored,
  • unordinary,
  • uncelebrated,
  • uninvestigated,
  • far-fetched,
  • little-known,
  • Unapprehended,
  • Unascertained,
  • Undivulged,
  • Unglorified,
  • Unrenowned,
  • virgin,
  • queer,
  • unnotable,
  • unfamed.

Antonyms for Unheard-of:

• adj.

  • exceptional
    common, conventional, expected, general, ordinary, regular, unexceptional.
  • extraordinary
    commonplace, customary, unsurprising, unextraordinary.
  • inconceivable
    believable, conceivable, fathomable, imaginable, reasonable.
  • nameless
    designated, distinguished, eminent, famous, known, named, prominent, renowned.
  • unaccountable
    accountable, comprehensible, explainable, responsible.
  • uncanny
    earthly, natural.
  • unheard-of
    normal, usual, Familiar.
  • Other antonyms:
    conventional, derivative, established, hackneyed, imitative, known, old, time-honored, tired, traditional, tried, tried and true, warmed-over.