The word "undreamedof" means unimaginable or unprecedented. Some synonyms for this word include unimagined, unheard of, unexpected, incomprehensible, extraordinary, and unbelievable. Additional synonyms include unique, novel, groundbreaking, amazing, astonishing, and miraculous. The term can also be replaced with words such as unimaginable, inconceivable, unanticipated, unthought-of, and unforeseen. Whether you are creating a story, writing a paper, or simply expanding your vocabulary, experimenting with different synonyms can add depth and variety to your writing. The context in which you use these words will dictate which synonym is best suited for your purposes.