Irish vs poteen

Irish and poteen both are nouns.

Word	Noun	Adjective	Verb	Adverb
Irish	Yes	Yes	No	No
poteen	Yes	No	No	No

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

Irish (noun)	poteen (noun)
the Celtic language of Ireland	unlawfully distilled Irish whiskey
whiskey made in Ireland chiefly from barley
people of Ireland or of Irish extraction

Irish (adjective)	poteen (adjective)
of or relating to or characteristic of Ireland or its people