fly poison vs liliaceous plant

fly poison and liliaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
fly poison	Yes	No	No	No
liliaceous plant	Yes	No	No	No

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

fly poison: all parts of plant are highly toxic; bulb pounded and used as a fly poison; sometimes placed in subfamily Melanthiaceae
liliaceous plant: plant growing from a bulb or corm or rhizome or tuber

fly poison (noun)	liliaceous plant (noun)
all parts of plant are highly toxic; bulb pounded and used as a fly poison; sometimes placed in subfamily Melanthiaceae	plant growing from a bulb or corm or rhizome or tuber