The crossword solutions for the term MORE VACUOUS are HOLLOWER (8 letters) and INANER (6 letters). Both words are adjectives that describe something as being empty or lacking in substance. HOLLOWER is a comparative form of the adjective HOLLOW, meaning having an empty space inside, while INANER is a comparative form of the adjective INANE, meaning silly or pointless. Together, they suggest that something is even more empty or lacking in substance than it was before.