marine vs offshore

marine is a noun but offshore is not a noun.

Word	Noun	Adjective	Verb	Adverb
marine	Yes	Yes	No	No
offshore	No	Yes	No	Yes

marine (noun)	offshore (noun)
a soldier who serves both on shipboard and on land

marine (adjective)	offshore (adjective)
relating to or characteristic of or occurring on or in the sea	(of winds) coming from the land
of or relating to the sea	at some distance from the shore
of or relating to military personnel who serve both on land and at sea (specifically the U.S. Marine Corps)
relating to or involving ships or shipping or navigation or seamen
native to or inhabiting the sea

marine (adverb)	offshore (adverb)
	away from shore; away from land