country vs Irish people

country and Irish people both are nouns.

Word	Noun	Adjective	Verb	Adverb
country	Yes	No	No	No
Irish people	Yes	No	No	No

As nouns, Irish people is a hyponym of country; that is, Irish people is a word with a more specific, narrower meaning than country:

country (noun)	Irish people (noun)
a politically organized body of people under a single government	people of Ireland or of Irish extraction
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)