Cast of countenance is a phrase that refers to the expression on someone's face. There are various synonyms for this phrase which can be used to express a person's facial expression or overall demeanor. Some of the synonyms include Visage, Facial Expression, Mien, Look, Appearance, and Aspect. These words describe how someone presents themselves to the world and the emotions that may be conveyed through their facial expression. For instance, someone with a stern countenance suggests that they are serious while someone with a cheerful visage implies a happy and optimistic demeanor. Generally, these words are used in literature or formal speech. They are a great way to add variety to your writing and express someone's emotional state more clearly.