A "sci-fi movie" can be referred to as a number of different synonyms. Some common alternatives include "science fiction film," "sci-fi flick," and "futuristic movie." In addition, one could use terms like "outer space adventure" or "fantastical film" to describe movies with a similar genre. Other options include "future-oriented cinema," "space-age storytelling," and "speculative motion picture." Moreover, one could refer to these movies as "futuristic thrillers," "otherworldly blockbusters," or simply "sci-fi classics." Ultimately, there are many different ways to refer to the genre, each with their own unique connotations and implications.