potato vs starches

potato and starches both are nouns.

Word	Noun	Adjective	Verb	Adverb
potato	Yes	No	No	No
starches	Yes	No	No	No

As nouns, starches is a hypernym of potato; that is, starches is a word with a broader meaning than potato:

potato: an edible tuber native to South America; a staple food of Ireland
starches: foodstuff rich in natural starch (especially potatoes, rice, bread)

Other hypernyms of potato include solanaceous vegetable, root vegetable.

potato (noun)	starches (noun)
an edible tuber native to South America; a staple food of Ireland	foodstuff rich in natural starch (especially potatoes, rice, bread)
annual native to South America having underground stolons bearing edible starchy tubers; widely cultivated as a garden vegetable; vines are poisonous