Specifically, an instance of a decentralized governing structure among the indigenous peoples of North America.
A state where the sovereign constituent units delegate their authority to the centre. As opposed to a federation, where the central and regional governments are each equal and sovereign in their own sphere.
An alliance.
The state of people of different types, races, cultures, communities, etc., living together.
The occurrence of two different or opposing things in the same time and place.
A close, prolonged association between two or more organisms of different species, regardless of benefit to the members.
A close, prolonged association between two or more organisms of different species that normally benefits both members. An interspecies cooperation.
A relationship of mutual benefit, especially among different species.