ally

nouns

a friendly nation
ally
is a member of
an organization of people (or countries) involved in a pact or treaty
alignment, alinement, alliance, coalition
is a type of (narrower)
a politically organized body of people under a single government
"the state has elected a new president"; "African nations"; "students who had come to the nation's capitol"; "the country's largest manufacturer"; "an industrialized land"
body politic, commonwealth, country, land, nation, res publica, state
an associate who provides cooperation or assistance
"he's a good ally in fight"
ally, friend

verbs

become an ally or associate, as by a treaty or marriage
"He allied himself with the Communists"
ally
is derived from
alliance
is a type of (narrower)
keep company with; hang out with
"He associates with strange people"; "She affiliates with her colleagues"
affiliate, associate, assort, consort