The word "most ceraceous" can be defined as something that is extremely smooth, shiny, and resembling wax. Some synonyms for this term could be glossy, sleek, polished, lustrous, shiny, gleaming, and smooth. These words describe a surface or texture that is immaculate and reflective, similar to the appearance of wax. In addition to these synonyms, other terms such as silky, satiny, and velvety could also be used to describe a smooth and pleasing texture. Overall, there are many different words that could be used as synonyms for "most ceraceous," but they all share a common thread of describing something that is polished and shiny.