is a specific kind of: political entity, political unit.

is a broader term that covers: commonwealth country | developing country | Dominion | foreign country | Reich | renegade state, rogue nation, rogue state | suzerain | sea power | great power, major power, power, superpower, world power | city-state, city state | ally ... show more.

instances of which are: Eelam, Tamil Eelam.

has as a part: estate, estate of the realm, the three estates.