kingdomEnglishOxford English Thesauruskingdom noun 1 his kingdom covered many countries: realm, domain, dominion, country, land, nation, state, sovereign state, province, territory; empire, principality, palatinate, duchy. 2 the third floor was Henry's little kingdom: domain, province, realm, sphere, sphere/field of influence, dominion, area of power, department, territory, field, arena, zone, orbit. 3 homeopathic remedies are drawn from the plant and mineral kingdoms: division, category, classification, grouping, group; class, family, genus, kind, order, branch.kingdom Oxford Dictionary of English