federate

to form or enter into an association that furthers the interests of its members in the years following World War II, the U.S. and the nations of western Europe made the decision to federate as the North Atlantic Treaty Organization Synonyms associate, band (together), club, coalesce, cohere, confederate, conjoin, cooperate, ally, league, uniteRelated Words cabal, collaborate, gang up, hang together, team (up); incorporate, organize, unionize; affiliate; amalgamate, combine, conglomerate, consolidate, converge, group, join, merge; knot, link, tie, wedNear Antonyms detach, disengage, dissolve, disunite, divorce, part, segregate, separate, sever, split, sunder; alienate, estrange, fall outAntonyms break up, disband