squill vs sea squill

squill and sea squill both are nouns.

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

As nouns, squill and sea squill are synonyms defined as:

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

Other synonyms of squill include sea onion, Urginea maritima.

squill (noun)	sea squill (noun)
an Old World plant of the genus Scilla having narrow basal leaves and pink or blue or white racemose 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
bulb of the sea squill, which is sliced, dried, and used as an expectorant