ally
A person, group, or state (etc) which is associated with another for a common cause; one united to another by treaty or common purpose; a confederate.
the two countries were allies in WWI
A person, group, concept (etc) which is associated with another as a helper; a supporter; an auxiliary.
Anything akin to something else by structure, etc.
A closely related species, usually within the same family.
Gruiformes — cranes and allies
A relative; a kinsman.