spud vs Irish potato

spud and Irish potato both are nouns.

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

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

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

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

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

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