Word Study
heartland
THESAURUS
heartland
airspace, area, belt, confines, continental shelf, corridor, country, department, district, division, environs, ground, hinterland, inland, inlands, interior, land, midland, midlands, milieu, neighborhood, offshore rights, part, parts, place, precincts, premises, purlieus, quarter, region, salient, section, soil, space, terrain, territory, three-mile limit, twelve-mile limit, up-country, vicinage, vicinity, zoneFor further exploring for "heartland" in Webster Dictionary Online