The antonyms for the term "under surfaces" are over, above, on top, atop, and uppermost. These words describe the opposite of under surfaces, which refer to the lower or underside of something. Over, above, on top, and atop all refer to the higher or upper part of an object. On top and atop both suggest a more specific location, often meaning directly above or resting on something. Uppermost, on the other hand, indicates the highest or most elevated point. These antonyms help to create a clearer distinction between under surfaces and their opposite, providing a more precise vocabulary to describe different parts of an object or area.