sword lily vs iridaceous plant

sword lily and iridaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
sword lily	Yes	No	No	No
iridaceous plant	Yes	No	No	No

As nouns, iridaceous plant is a hypernym of sword lily; that is, iridaceous plant is a word with a broader meaning than sword lily:

sword lily: plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
iridaceous plant: any bulbous plant of the family Iridaceae

As nouns, iridaceous plant is a hypernym of sword lily; that is, iridaceous plant is a word with a broader meaning than sword lily:

sword lily: any of numerous plants of the genus Gladiolus native chiefly to tropical and South Africa having sword-shaped leaves and one-sided spikes of brightly colored funnel-shaped flowers; widely cultivated
iridaceous plant: any bulbous plant of the family Iridaceae

sword lily (noun)	iridaceous plant (noun)
plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals	any bulbous plant of the family Iridaceae
any of numerous plants of the genus Gladiolus native chiefly to tropical and South Africa having sword-shaped leaves and one-sided spikes of brightly colored funnel-shaped flowers; widely cultivated