country vs the three estates

country and the three estates both are nouns.

Word	Noun	Adjective	Verb	Adverb
country	Yes	No	No	No
the three estates	Yes	No	No	No

country (noun)	the three estates (noun)
a politically organized body of people under a single government	a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights
the people who live in a nation or country
the territory occupied by a nation
an area outside of cities and towns
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)