7 letters · 12 points in Scrabble
noun rising current of warm air
adjective relating to or associated with heat
adjective of or relating to a hot spring
originFrom French thermal, from New Latin *thermalis, from Ancient Greek θέρμη (thérmē, “heat”), from Proto-Indo-European *gʷʰer- (“to heat, warm”).
Etymology from Wiktionary, CC BY-SA 3.0