Pandimensional is a unique term that refers to things that exist in multiple dimensions. However, if you are looking for synonyms of this word, some options are multidimensional, omnidimensional, and transdimensional. Each of these words encompasses the concept of something that exists in more than one dimension and can be used interchangeably with pandimensional to describe entities that transcend the boundaries of our three-dimensional world. Other synonyms that can be used include higher-dimensional, extra-dimensional, and beyond-dimensional. All of these words are useful when describing things that exist beyond our understanding of space and time.