10 letters · 14 points in Scrabble
noun an associate in an activity or endeavor or sphere of common interest
originEtymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-der. English co- English operator English cooperator From co- + operator.
Etymology from Wiktionary, CC BY-SA 3.0