The antonyms for the word "belowground" are "aboveground," "above surface," "surface level," "surface," and "overground." All these words connote the opposite of "belowground," which suggests being at, or beneath, the ground level. The term "aboveground" indicates objects or things above the ground or surface, commonly referring to structures or parts of structures above and not below. Similarly, the term "overground" indicates things or objects on top of the ground or surface, suggesting being at a higher level. The use of antonyms provides context and clarity in language, allowing for the precise understanding and communication of ideas or concepts, such as the spatial dimension of an object or thing.