country vs domain

country and domain both are nouns.

Word	Noun	Adjective	Verb	Adverb
country	Yes	No	No	No
domain	Yes	No	No	No

country (noun)	domain (noun)
a politically organized body of people under a single government	the content of a particular field of knowledge
the people who live in a nation or country	people in general; especially a distinctive group of people with some shared interest
the territory occupied by a nation	(mathematics) the set of values of the independent variable for which a function is defined
an area outside of cities and towns	territory over which rule or control is exercised
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)	a particular environment or walk of life