harebell vs liliaceous plant

harebell and liliaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
harebell	Yes	No	No	No
liliaceous plant	Yes	No	No	No

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

harebell (noun)	liliaceous plant (noun)
perennial of Northern Hemisphere with slender stems and bell-shaped blue flowers	plant growing from a bulb or corm or rhizome or tuber
sometimes placed in genus Scilla