9 letters · 15 points in Scrabble
adjective being where earthquake waves arrive simultaneously
originEtymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-der. English co- English seismic English coseismic From co- + seismic.
Etymology from Wiktionary, CC BY-SA 3.0