11 letters · 16 points in Scrabble
originEtymology tree Proto-Indo-European *gʰrem-der. Proto-Germanic *grunduz Old English grund Middle English ground English ground Proto-Indo-European *wed- Proto-Indo-European *-r̥ Proto-Indo-European *wódr̥ Proto-Germanic *watōr Proto-West Germanic *watar Old English wæter Middle English water English water English groundwater From ground + water.
Etymology from Wiktionary, CC BY-SA 3.0