18 letters · 31 points in Scrabble
originEtymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr) Ancient Greek ἀέρος (aéros)der. English aero- Proto-Indo-European *gʷʰer-der. Ancient Greek θερμός (thermós)der. English thermo- English dynamics English thermodynamics English aerothermodynamics From aero- + thermodynamics.
Etymology from Wiktionary, CC BY-SA 3.0