Vitrescence refers to the quality of being glassy or vitreous. There are several synonyms for this word, including glassiness, translucency, transparency, and glaze. Glassiness refers to the state of being transparent and smooth like glass. Translucency, on the other hand, refers to the quality of being transparent in parts but not in others. Transparency refers to the ability of light to pass through a substance, making objects behind it visible. Glaze, on the other hand, refers to a coating of glassy material on an object. All of these synonyms express the idea of something being clear, smooth, and glassy in appearance.