A boll is a botanical term that refers to the protective fruiting capsule of plants like cotton, flax, and okra. However, there are a variety of synonyms for this word depending on the context of its use. For example, the term pod is often used for similar structures in leguminous plants such as peas and beans. Capsule and follicle are other synonyms that can describe the structures that encase seeds or spores in plants. Meanwhile, terms like bud, bolus, and ball can also be used informally in different contexts to refer to a small spherical object or bundle. So, whether you're discussing gardening, anatomy, or even sports, there are plenty of synonyms to choose from for the word boll.