Crossword clues for the word: BLACKHOLES The word BLACKHOLES has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for BLACKHOLES Showing 1 to 6 of 6 results Clue(s) Attractive features in book to be without plot problems? Great voids There's no escaping them They contain high gravitational fields They have extremely high gravitational fields Universe singularities