10 letters · 21 points in Scrabble
originEtymology tree Ancient Greek ἐκ (ek) Ancient Greek ἔξω (éxō)der. English exo- English spore Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English exosporium From exo- + spore + -ium.
Etymology from Wiktionary, CC BY-SA 3.0