12 letters · 21 points in Scrabble
originEtymology tree Proto-Indo-European *gʷʰer-der. Ancient Greek θερμός (thermós)der. English thermo- Ancient Greek τροπῐκός (tropĭkós)bor. English -tropic English thermotropic From thermo- + -tropic.
Etymology from Wiktionary, CC BY-SA 3.0