The term "top sides" refers to the upper part or surface of something, usually an object or a structure. Its antonyms, on the other hand, are the bottom, underside, or base. It is important to understand antonyms as they are useful in expanding our vocabulary and communication skills. Top sides and its antonyms can be applied in various contexts, such as construction, cooking, and fashion. For instance, in building a house, the top sides would refer to the roof, while the underside would be the foundation. When cooking a cake, the top sides would be the crust, and the bottom would be the base. And in fashion, the top sides of a garment are usually the most visible or prominent part, while the underside is often hidden or less visible.