The crossword solution for the term CAPTAIN, E.G. is RANK, which is a four-letter word. The RANK of captain is a military or naval RANK that is typically above lieutenant and below major. In the United States Navy, the RANK of captain is the highest RANK attainable by an officer in the Navy, and is equivalent to the RANK of colonel in the Army and Marine Corps. In the British Royal Navy, the RANK of captain is the most senior field officer RANK, and is equivalent to the RANK of colonel in the Army.