Yam
Part of speech: noun
Definition: Any climbing vine of the genus Dioscorea in the Eastern and Western hemispheres, usually cultivated The edible, starchy, tuberous root of that plant, a tropical staple food. A sweet potato. Potato. home.
Cassava
Part of speech: noun
Definition: manioc, the source of tapioca, Manihot esculentaTapioca, a starchy pulp made with the roots of this tropical plant.