being or of a confederation of independent nations or states: progress toward a confederal Europe
See confederal in American Heritage Dictionary 4
(kən-fĕdˈər-əl, -fĕdˈrəl)
adjective
Of or relating to confederation or a specific confederation.
Of, relating to, or involving the activities of two or more nations: “Can federal or confederal solutions be negotiated to limit ethnic strife?”(Lincoln P. Bloomfield).