18 letters · 24 points in Scrabble
originFrom Latin vērisimilitūdin- + -ous, from oblique stem of Latin vērisimilitūdō, from vērī (genitive of vērus) + similitūdō, from similis + -tūdō. By surface analysis, verisimilitude + -ous.
Etymology from Wiktionary, CC BY-SA 3.0