Arum palaestinum vs aroid

Arum palaestinum and aroid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Arum palaestinum	Yes	No	No	No
aroid	Yes	Yes	No	No

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

Arum palaestinum: ornamental plant of Middle East cultivated for its dark purple spathe
aroid: any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe

Other hypernyms of Arum palaestinum include arum.

Arum palaestinum (noun)	aroid (noun)
ornamental plant of Middle East cultivated for its dark purple spathe	any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe

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