9 letters · 13 points in Scrabble
noun (logic) a statement that is necessarily true
noun useless repetition
originFrom Late Latin tautologia, from Ancient Greek ταὐτολογία (tautología) from ταὐτός (tautós, “the same”) + λόγος (lógos, “explanation”). By surface analysis, tauto- + -logy.
Etymology from Wiktionary, CC BY-SA 3.0