11 letters · 17 points in Scrabble
originEtymology tree Proto-Indo-European *upó Proto-Italic *supo Latin sub Latin sub-der. English sub- English base Proto-Indo-European *-mn̥ Proto-Indo-European *-mn̥tom Proto-Italic *-mentom Latin -mentum Old French -mentbor. Middle English -ment English -ment English basement English subbasement From sub- + basement.
Etymology from Wiktionary, CC BY-SA 3.0