Cassava and Mandioc

Cassava noun - Any of several plants of the genus Manihot having fleshy roots yielding a nutritious starch.

Mandioc and cassava are semantically related. In some cases you can replace term "Mandioc" with "Cassava", this nouns are similar.

Mandioc noun - Cassava with long tuberous edible roots and soft brittle stems; used especially to make cassiri (an intoxicating drink) and tapioca.

Cassava and mandioc are semantically related. You can use "Cassava" instead a noun "Mandioc".