The term "border ground" refers to the area that lies between two different territories or jurisdictions. Synonyms for this phrase may include "borderland," "frontier," "perimeter," "boundary zone," or "liminal zone." Other possible alternatives to "border ground" include "the edge," "the fringe," "the margin," "the outskirts," or "the verge." These terms are often used to describe areas where different cultures, languages, or political systems interact with each other. They can also refer to regions where different ecological or geological features converge, such as where a forest meets a meadow, or where a river runs into the sea.