jack-in-the-pulpit vs aroid

jack-in-the-pulpit and aroid both are nouns.

Word	Noun	Adjective	Verb	Adverb
jack-in-the-pulpit	Yes	No	No	No
aroid	Yes	Yes	No	No

As nouns, aroid is a hypernym of jack-in-the-pulpit; that is, aroid is a word with a broader meaning than jack-in-the-pulpit:

jack-in-the-pulpit: common American spring-flowering woodland herb having sheathing leaves and an upright club-shaped spadix with overarching green and purple spathe producing scarlet berries
aroid: any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe

Other hypernyms of jack-in-the-pulpit include arum.

As nouns, aroid is a hypernym of jack-in-the-pulpit; that is, aroid is a word with a broader meaning than jack-in-the-pulpit:

jack-in-the-pulpit: common European arum with lanceolate spathe and short purple spadix; emerges in early spring; source of a starch called arum
aroid: any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe

Other hypernyms of jack-in-the-pulpit include arum.

jack-in-the-pulpit (noun)	aroid (noun)
common American spring-flowering woodland herb having sheathing leaves and an upright club-shaped spadix with overarching green and purple spathe producing scarlet berries	any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe
common European arum with lanceolate spathe and short purple spadix; emerges in early spring; source of a starch called arum

jack-in-the-pulpit (adjective)	aroid (adjective)
	relating to a plant of the family Araceae