Rimiest refers to the presence of frost or ice on a surface. Synonyms for rimiest include frostiest, icy, frozen, chilled, frost-covered, hoar-frosted, and glacial. These words are commonly used to describe the wintry landscape, where icy conditions on roads and sidewalks can be hazardous. Rimiest can also describe the texture of glassware or surfaces that have accumulated a layer of frost or ice. In literature and poetry, the word frosty is often used to describe harsh or uninviting environments, while icy and frozen may have connotations of fear or danger. Overall, there are several alternatives to the word rimiest, each emphasizing the cold, icy, or frost-filled quality of the object being described.