The answer is:
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Marinership (n.) — Seamanship.
Marine (a.) — Of or pertaining to the sea; having to do with the ocean, or with navigation or naval affairs; nautical; as, marine productions or bodies; marine shells; a marine engine.
Marine (a.) — Formed by the action of the currents or waves of the sea; as, marine deposits.
Marine (a.) — A solider serving on shipboard; a sea soldier; one of a body of troops trained to do duty in the navy.
Marine (a.) — The sum of naval affairs; naval economy; the department of navigation and sea forces; the collective shipping of a country; as, the mercantile marine.