Definitions of alliance:

• noun:   a formal agreement establishing an association or alliance between nations or other groups to achieve a particular aim
• noun:   an organization of people (or countries) involved in a pact or treaty
• noun:   a connection based on kinship or marriage or common interest

  Example: "The shifting alliances within a large family"

• noun:   the state of being allied or confederated
• noun:   the act of forming an alliance or confederation
• name:  A surname (very rare: popularity rank in the U.S.: #88609)