C3O1O1P3E1R1A1T1E1D2
15 points
COOPERATED is validvalid
COOPERATE, [v COOPERATED, COOPERATES, COOPERATING] : COOPERATION [v]
COOPERATE, to work together [v]
COOPERATE, [v COOPERATED, COOPERATES, COOPERATING] : COOPERATION [v]
COOPERATE, to work together [v]