The antonyms for the word "more lusterless" includes words like glossier, shinier, sparkling, luminous, bright, radiant, and glistening. These words denote a state of radiance, brightness, and brilliance that is precisely opposite to the dullness that is associated with lusterlessness. When something appears glossier or shinier, it automatically draws attention and looks visually appealing. On the other hand, when something lacks luster, it seems uninteresting and bland. Hence, these antonyms are important to give a clear understanding of the two contrasting states and their visual impact. Using such antonyms can help in creating engaging and vivid descriptions.