"allied" in the verb sense
become an ally or associate, as by a treaty or marriage
"He allied himself with the Communists"
"allied" in the adjective sense
related by common characteristics or ancestry
of or relating to or denoting the Allies in World War II
"an Allied victory"
"the Allied armies"
of or relating to or denoting the Allies in World War I
"an allied offensive"
"the Allied powers"
4. allied, confederate, confederative
united in a confederacy or league
joined by treaty or agreement
Source: WordNet® (An amazing lexical database of English)
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