alliance
noun.
the state of being allied or confederated
Synonym: confederation
noun.
a connection based on kinship or marriage or common interest
the shifting alliances within a large family|their friendship constitutes a powerful bond between them
Synonym: bond
noun.
an organization of people (or countries) involved in a pact or treaty
noun.
a formal agreement establishing an association or alliance between nations or other groups to achieve a particular aim
noun.
the act of forming an alliance or confederation
Synonym: confederation