tater vs Irish potato

tater and Irish potato both are nouns.

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

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

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

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

tater (noun)	Irish 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