9 letters · 15 points in Scrabble
originEtymology tree English valve Proto-Indo-European *lewh₁- Proto-Indo-European *lewHs-der. Proto-Germanic *leusaną Proto-Germanic *lausaz Proto-Germanic *-lausaz Proto-West Germanic *-laus Old English -lēas Middle English -les English -less English valveless From valve + -less.
Etymology from Wiktionary, CC BY-SA 3.0