Caribbean vs sea

Caribbean and sea both are nouns.

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

Caribbean (noun)	sea (noun)
region including the Caribbean Islands	a division of an ocean or a large body of salt water partially enclosed by land
an arm of the Atlantic Ocean between North and South America; the origin of the Gulf stream	turbulent water with swells of considerable size
	anything apparently limitless in quantity or volume