10 letters · 14 points in Scrabble
originFirst attested in 1653; formed as the Latin sinciput (stem: sincipit-) + the English -al on the pattern of a Latin etymon of the form sincipitālis, which is first attested later (in 1757); compare the French sincipital (first attested in 1812).
Etymology from Wiktionary, CC BY-SA 3.0