12 letters · 13 points in Scrabble
originEtymology tree Proto-Italic *wre- Latin re-der. Old French re-bor. Middle English re- English re- English regulate Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English -ion English reregulation From re- + regulate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0