WordRel.com

• the act of forming an alliance or confederation

  synonym	confederation
  derivation	ally
  hypernym	group action

• a formal agreement establishing an association or alliance between nations or other groups to achieve a particular aim

  hypernym	accordpacttreaty
  hyponym	symmachy

• an organization of people (or countries) involved in a pact or treaty

  synonym	alignmentalinementcoalition
  hypernym	organisationorganization
  hyponym	alliesAlliesAlliesaxisAxisblocCentral Powerscombinationententeentente cordialeglobal organizationinternational organisationinternational organizationNorthern Alliancepopular frontUnited Frontworld organisationworld organization
  mero member	ally

• a connection based on kinship or marriage or common interest

  synonym	bond
  hypernym	connectednessconnectionconnexion
  hyponym	silver cord

• the state of being allied or confederated

  synonym	confederation
  hypernym	coalitionfusion