sea onion vs genus Urginea

sea onion and genus Urginea both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea onion	Yes	No	No	No
genus Urginea	Yes	No	No	No

sea onion (noun)	genus Urginea (noun)
European scilla with small blue or purple flowers	Mediterranean liliaceous plants; sometimes placed in family Hyacinthaceae
having dense spikes of small white flowers and yielding a bulb with medicinal properties