13 letters · 15 points in Scrabble
originFrom Ancient Greek δευτεραγωνιστής (deuteragōnistḗs, literally “second actor”), originally in Greek drama, from ἀγωνιστής (agōnistḗs, “a combatant, pleader, actor”). By surface analysis, deuter- (“second”) + agonist (“combatant, participant”).
Etymology from Wiktionary, CC BY-SA 3.0