11 letters · 17 points in Scrabble
noun one of two or more signers of the same document (as a treaty or declaration)
adjective signing jointly with others
originEtymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-der. English co- English signatory English cosignatory From co- + signatory.
Etymology from Wiktionary, CC BY-SA 3.0