Duchy(n.) The territory or dominions of a duke; a dukedom.
Thesaurus Entries
Kreis, ally, archbishopric, archdiocese, archduchy, archdukedom, arrondissement, bailiwick, bishopric, body politic, borough, buffer state, canton, captive nation, chieftaincy, chieftainry, city, city-state, colony, commonweal, commonwealth, commune, congressional district, constablewick, country, county, departement, diocese, district, domain, dominion, dukedom, earldom, electoral district, electorate, empery, empire, free city, government, grand duchy, hamlet, hundred, kingdom, land, magistracy, mandant, mandate, mandated territory, mandatee, mandatory, metropolis, metropolitan area, nation, nationality, oblast, okrug, parish, polis, polity, possession, power, precinct, principality, principate, protectorate, province, puppet government, puppet regime, realm, region, republic, riding, satellite, seneschalty, settlement, sheriffalty, sheriffwick, shire, shrievalty, soke, sovereign nation, stake, state, sultanate, superpower, territory, toparchia, toparchy, town, township, village, wapentake, ward