The word "stunner" is often used to describe something or someone that is visually striking or impressive. Some synonyms for this word include "beauty," "knockout," "bombshell," "eye-catcher," "showstopper," "head-turner," "dazzler," "wow factor," "flawless," "gorgeous," "alluring," "mesmerizing," "ravishing," "jaw-dropping," "breathtaking," and "stunning beauty." Each of these words emphasizes the beauty or visual appeal of the subject being described, and can be used interchangeably with "stunner" to convey the same meaning. Whether referring to a piece of art, a landscape, or a person, these synonyms can add variation and nuance to your writing.