The adjective "saccular" describes something that is shaped like a sac or pouch. It is often used in medical terminology to refer to the anatomy of an organ, such as a saccular aneurysm. However, there are many synonyms that can be used to describe a saccular shape. These include bulbous, pouch-shaped, rounded, bladder-like, baggy, swollen, distended, and protuberant. Depending on the context, one of these synonyms may be a more appropriate choice than "saccular". For example, if describing the shape of a plant organ, "bulbous" or "bladder-like" may be more fitting than "saccular".