Alter trailer is a phrase that is commonly used in the film industry to refer to a new cut or version of a movie trailer. There are several synonyms that can be used in place of "alter trailer". These include "re-cut trailer", "revised trailer", "updated trailer", "refreshed trailer", "remodeled trailer", and "revamped trailer". All of these terms essentially mean the same thing - a new and improved version of a movie trailer that has been edited or revised to make it more effective in promoting the film. The terminology used may vary, but the goal remains the same - to create a trailer that will entice audiences and generate interest in the movie.