Manihot dulcis vs sweet cassava

Manihot dulcis and sweet cassava both are nouns.

Word	Noun	Adjective	Verb	Adverb
Manihot dulcis	Yes	No	No	No
sweet cassava	Yes	No	No	No

As nouns, Manihot dulcis and sweet cassava are synonyms defined as:

Manihot dulcis and sweet cassava: South American plant with roots used as a vegetable and herbage used for stock feed

Manihot dulcis (noun)	sweet cassava (noun)
South American plant with roots used as a vegetable and herbage used for stock feed	South American plant with roots used as a vegetable and herbage used for stock feed