murphy vs white potato

murphy and white potato both are nouns.

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

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

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

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

murphy (noun)	white 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