The phrase "mid-continent" typically refers to a region located in the central part of a large land mass or continent. Synonyms for this term include "interior," "heartland," "central region," and "continental center." These words all convey the idea of a region located in the middle of a larger landmass. Other synonyms for "mid-continent" might include phrases like "central zone," "midland area," or "region of the center." These terms are useful for describing a particular area in a concise manner and can be used in a range of contexts, from geography and history to business and politics.