Recumbence is the act or state of lying down or reclining. There are many synonyms for recumbence including reclining, lying, resting, leaning, sprawling, slouching, lounging, and prostrate. All of these words convey a similar meaning of being in a position of relaxation or repose. Depending on the context, one synonym may be more appropriate than another. For example, "resting" may be more suitable for a peaceful setting, while "sprawling" may be used to describe a more careless or reckless posture. In any case, these synonyms for recumbence can add variety and nuance to your writing and communication.