The phrase "close to ground" can be replaced by a number of different synonyms, depending on the context and intended meaning. One commonly used term is "low to the ground," which implies a physical proximity to the earth's surface. Other options include "near ground level," "at ground level," "ground-hugging," and "close to earth." These phrases can be used to describe objects or living things that are short, or have a low profile, such as plants, animals, or buildings. They can also be used in a more abstract sense, to describe ideas or concepts that are grounded in reality, or have a solid foundation.