12 letters · 18 points in Scrabble
originEtymology tree English endothelium Proto-Indo-European *-yéti Proto-Indo-European *-oyétider.? Ancient Greek -όω (-óō) Proto-Indo-European *-mn̥ Ancient Greek -μᾰ (-mă) Ancient Greek -ωμα (-ōma)der. English -oma English endothelioma From endothelium + -oma.
Etymology from Wiktionary, CC BY-SA 3.0