1. ally: one of two or more people, groups, or nations that have formed an alliance for a common purpose
2. accomplice: a plotter or conspirator
adjective
Definition:
associated: joined in common purpose
transitive and intransitive verb (past and past participlecon·fed·er·at·ed, present participlecon·fed·er·at·ing, 3rd person present singularcon·fed·er·ates)
Definition:
unite: to form people, groups, or nations into a confederacy, or become part of a confederacy
[14th century. < late Latin confoederat-, past participle of confoederare "league together" < foeder- (see federal)]