Manihot esculenta vs casava

Manihot esculenta and casava both are nouns.

Word	Noun	Adjective	Verb	Adverb
Manihot esculenta	Yes	No	No	No
casava	Yes	No	No	No

As nouns, casava is a hypernym of Manihot esculenta; that is, casava is a word with a broader meaning than Manihot esculenta:

Manihot esculenta: cassava with long tuberous edible roots and soft brittle stems; used especially to make cassiri (an intoxicating drink) and tapioca
casava: any of several plants of the genus Manihot having fleshy roots yielding a nutritious starch

Other hypernyms of Manihot esculenta include cassava.

Manihot esculenta (noun)	casava (noun)
cassava with long tuberous edible roots and soft brittle stems; used especially to make cassiri (an intoxicating drink) and tapioca	any of several plants of the genus Manihot having fleshy roots yielding a nutritious starch