7 letters · 14 points in Scrabble
noun a deliberately invalid argument displaying ingenuity in reasoning in the hope of deceiving someone
originFrom Middle English sophim, from Old French soffime, sofime, sofisme, sophisme, from Latin sophisma (“fallacy, sophism”), from Ancient Greek σόφῐσμᾰ (sóphĭsmă), from σοφίζω (sophízō) + -μα (-ma).
Etymology from Wiktionary, CC BY-SA 3.0