meadow saffron vs bulbous plant

meadow saffron and bulbous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
meadow saffron	Yes	No	No	No
bulbous plant	Yes	No	No	No

As nouns, bulbous plant is a hypernym of meadow saffron; that is, bulbous plant is a word with a broader meaning than meadow saffron:

meadow saffron: bulbous autumn-flowering herb with white, purple or lavender-and-white flowers; native to western and central Europe
bulbous plant: plant growing from a bulb

meadow saffron (noun)	bulbous plant (noun)
bulbous autumn-flowering herb with white, purple or lavender-and-white flowers; native to western and central Europe	plant growing from a bulb