spoonflower vs arum

spoonflower and arum both are nouns.

Word	Noun	Adjective	Verb	Adverb
spoonflower	Yes	No	No	No
arum	Yes	No	No	No

As nouns, arum is a hypernym of spoonflower; that is, arum is a word with a broader meaning than spoonflower:

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

Other hypernyms of spoonflower include aroid.

spoonflower (noun)	arum (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
	starch resembling sago that is obtained from cuckoopint root