Irish potato vs spud

Irish potato and spud both are nouns.

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

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

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

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

Irish potato (noun)	spud (noun)
an edible tuber native to South America; a staple food of Ireland	a sharp hand shovel for digging out roots and weeds
	an edible tuber native to South America; a staple food of Ireland

Irish potato (verb)	spud (verb)
	produce buds, branches, or germinate
	initiate drilling operations, as for petroleum