potato noun, often attributive

po·​ta·​to | \ pə-ˈtā-(ˌ)tō , -tə, dialectal pə-ˈdā-, bə- \
plural potatoes
Definition of potato
1: SWEET POTATO
2a: an erect South American herb (Solanum tuberosum) of the nightshade family widely cultivated for its edible starchy tuber
b: the tuber of a potato
— called also Irish potato, spud, white potato