Intergalactic spaces refer to the expansive voids of space that exist between galaxies. There are several synonyms that can be used to describe these vast regions of space. Some people might call them interstellar voids, indicating the emptiness that characterizes these areas. Others might prefer to use the term extragalactic space, emphasizing the fact that they exist beyond the confines of individual galaxies. Additionally, the phrase intergalactic voids can be used to describe these spaces, highlighting the fact that they are empty regions that separate galaxies from one another. Other possible synonyms might include interstellar abyss, empty expanses, and galactic voids. Regardless of which term you prefer, it's clear that the intergalactic spaces are a fascinating and awe-inspiring part of the universe.