| verb | become an ally or associate, as by a treaty or marriage “He allied himself with the Communists” |
| adjective | related by common characteristics or ancestry “allied species” |
| adjective | of or relating to or denoting the Allies in World War II “an Allied victory” |
| adjective | of or relating to or denoting the Allies in World War I “an allied offensive” |
| adjective | united in a confederacy or league |
| adjective | joined by treaty or agreement |
| ally | noun | an associate who provides cooperation or assistance |
| alliance | noun | the act of forming an alliance or confederation |
| confederate | noun | a person who joins with another in carrying out some plan (especially an unethical or illegal plan) |
| confederate | verb | form a confederation with; of nations |