sea squill vs liliaceous plant

sea squill and liliaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea squill	Yes	No	No	No
liliaceous plant	Yes	No	No	No

As nouns, liliaceous plant is a hypernym of sea squill; that is, liliaceous plant is a word with a broader meaning than sea squill:

sea squill: having dense spikes of small white flowers and yielding a bulb with medicinal properties
liliaceous plant: plant growing from a bulb or corm or rhizome or tuber

sea squill (noun)	liliaceous plant (noun)
having dense spikes of small white flowers and yielding a bulb with medicinal properties	plant growing from a bulb or corm or rhizome or tuber