unheard-of Synonyms

off beaten path unexposed unthinkable unbelievable unnamed unidentified little-known weird unusual unprecedented unknown unique unheard undetected unfamiliar unsung unrenowned unfamed unexplored unexplained undiscovered undesignated uncharted uncelebrated unascertained unapprehended unimaginable uncommon sui generis nameless innominate incredible inconceivable incomprehensible incogitable inapprehensible flasher fantastic extraordinary exceptional bizarre new novel strange soundless singular renownless remarkable rare phenomenal