10 letters · 15 points in Scrabble
noun a texture without roughness; smooth to the touch
noun powerful and effective language
noun the quality of being bland and gracious or ingratiating in manner
originFrom Middle English smothenesse; equivalent to smooth + -ness. Compare Old English smēþnes (“smoothness, a smooth place, a level surface”).
Etymology from Wiktionary, CC BY-SA 3.0