There are numerous synonyms for the term "opens mouth," that can be used to add variety and imagery to your writing. Some of the most common synonyms for this term include "gapes," "yawns," "gap-mouthed," and "agape." Other alternatives include "parts lips," "unleashes a breath," "breathes out," "lets out a gasp," and "starts to speak." The choice of synonym can depend on the context in which it is being used and the tone being conveyed. For example, "yawns" or "gapes" may be used to express boredom, while "lets out a gasp" can suggest surprise or shock. In general, using synonyms for "opens mouth" is a great way to make your writing stand out and add depth to your descriptions.