Cruise lines are companies that operate cruise ships, which are large passenger ships used for leisure travel. The term 'cruise line' is often used to refer to the company that owns and operates the ship. ROPE is a 4 letter word commonly used to refer to a cruise line, as it is an acronym for 'Recreational Ocean Passenger Experience'. SHOWMETHEMONEY is a 14 letter phrase which refers to the financial aspect of running a cruise line, as it is a phrase used to emphasize the importance of money in business.