malanga vs aroid

malanga and aroid both are nouns.

Word	Noun	Adjective	Verb	Adverb
malanga	Yes	No	No	No
aroid	Yes	Yes	No	No

As nouns, aroid is a hypernym of malanga; that is, aroid is a word with a broader meaning than malanga:

malanga: tropical American aroid having edible tubers that are cooked and eaten like yams or potatoes
aroid: any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe

Other hypernyms of malanga include arum.

malanga (noun)	aroid (noun)
tropical American aroid having edible tubers that are cooked and eaten like yams or potatoes	any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe

malanga (adjective)	aroid (adjective)
	relating to a plant of the family Araceae