sea onion vs Urginea maritima

sea onion and Urginea maritima both are nouns.

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

As nouns, sea onion and Urginea maritima are synonyms defined as:

sea onion and Urginea maritima: having dense spikes of small white flowers and yielding a bulb with medicinal properties

Other synonyms of sea onion include sea squill, squill.

sea onion (noun)	Urginea maritima (noun)
European scilla with small blue or purple flowers	having dense spikes of small white flowers and yielding a bulb with medicinal properties
having dense spikes of small white flowers and yielding a bulb with medicinal properties