Space odysseys refer to great adventures that take place in outer space. However, there are other words that can be used as synonyms for space odysseys. These include cosmic journeys, interstellar voyages, celestial adventures, galactic expeditions, and interplanetary escapades. Any of these terms can be used to describe the thrill and excitement that comes with exploring the vast, infinite realm of the universe. Whether it's in books, movies, or real-life space exploration, these synonyms give a sense of wonder and awe that can only be found among the stars.