Synonyms for the word "sheenly" include lustrous, glossy, radiant, shiny, polished, gleaming, and shimmering. These terms all describe an object or surface that has a bright, smooth, and reflective quality. "Lustrous" emphasizes a rich glow, while "glossy" implies a smooth, shiny appearance like that of polished leather. "Radiant" suggests a vibrant and glowing luster, while "shiny" denotes a bright and reflective surface. "Polished" refers to something that has been smooth and buffed to perfection. "Gleaming" describes a surface that emits a soft and intense light, and "shimmering" implies a gentle, wavering shine. Overall, these synonyms beautifully capture the essence of "sheenly" with their various shades of brightness and reflection.