Cruise lines are companies that operate cruise ships, which are large passenger ships used for pleasure voyages. The term 'cruise lines' is often used to refer to the companies that own and operate these ships, as well as the ships themselves. The term 'SCRIPT' is a six-letter word that can be used to describe the process of writing a screenplay or SCRIPT for a movie, television show, or other form of entertainment. Therefore, the term 'cruise lines' can be used to refer to the companies that own and operate cruise ships, while the term 'SCRIPT' can be used to describe the process of writing a screenplay or SCRIPT for a movie, television show, or other form of entertainment.