The term 'PERTAINING TO THE UNIVERSE' can be summarized by two crossword solutions: COSMIC (6 letters) and MACROCOSMIC (11 letters). The term COSMIC refers to anything related to the universe, such as stars, planets, galaxies, and other celestial bodies. On the other hand, MACROCOSMIC is a more general term that encompasses the entire universe, including all of its components. It is often used to describe the grand scale of the universe and its vastness.