Irish potato vs murphy

Irish potato and murphy both are nouns.

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

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

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

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

Irish potato (noun)	murphy (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