A rocket ship was a fictional faster-than-light rocket that featured in many 20th century science fiction stories.
The fictional character Captain Proton used a rocket ship which was equipped with a destructo beam. (VOY: "Bride of Chaotica!")
In July 1947, after encountering Quark, Rom, and Nog, Nurse Faith Garland believed that the Ferengi would teach Humanity how to build rocket ships to travel into space. (DS9: "Little Green Men")
In 1953, Roy Ritterhouse drew an illustration for the Incredible Tales magazine that showed a Human family being sold a rocket ship. (DS9: "Far Beyond the Stars")