marine vs Marine Corps

marine and Marine Corps both are nouns.

Word	Noun	Adjective	Verb	Adverb
marine	Yes	Yes	No	No
Marine Corps	Yes	No	No	No

marine (noun)	Marine Corps (noun)
a soldier who serves both on shipboard and on land	an amphibious division of the United States Navy

marine (adjective)	Marine Corps (adjective)
relating to or characteristic of or occurring on or in the sea
of or relating to the sea
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