Irish potato vs potato

Irish potato and potato both are nouns.

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

As nouns, Irish potato and potato are synonyms defined as:

Irish potato and potato: an edible tuber native to South America; a staple food of Ireland

Other synonyms of Irish potato include murphy, spud, tater, white potato.

Irish potato (noun)	potato (noun)
an edible tuber native to South America; a staple food of Ireland	an edible tuber native to South America; a staple food of Ireland
	annual native to South America having underground stolons bearing edible starchy tubers; widely cultivated as a garden vegetable; vines are poisonous