Acinar is a term used to describe the grape-like structures found in some organs of the body. These structures are responsible for the production and secretion of various fluids in the body. Synonyms for acinar include glandular, alveolar, and follicular. These terms describe the same anatomical structure and are used interchangeably depending on the context in which they are being used. Other more specific synonyms might include lobular or tubular, which describe the shape or arrangement of the acinar structures. Overall, these synonyms are useful for describing the complex structures of the body and the functions they serve in maintaining homeostasis.