8 letters · 18 points in Scrabble
noun an autocracy governed by a monarch who usually inherits the authority
originFrom Old French monarchie, from Late Latin monarchia, from Ancient Greek μοναρχία (monarkhía), from μόνος (mónos, “only”) + ἀρχή (arkhḗ, “power, authority”). By surface analysis, mon- (“one, single”) + -archy (“rule, command”).
Etymology from Wiktionary, CC BY-SA 3.0