Crossword clues for the word: CERBERUS The word CERBERUS has appeared as an answer to at least 10 crossword clues on different crossword puzzles. Crossword clues for CERBERUS Showing 1 to 10 of 10 results Clue(s) Challenge for Hercules. Dog guarding the gates of the underworld Hade's watchdog Heads off to deal with this gatekeeper? Multi-headed dog that guards Hades, in Greek myth Multiheaded dog guarding the gates of the underworld, in myth Mythical dog guard of Hade's door Subject of Hercules' Twelfth Labor Three-headed dog in Greek mythology guarding the entrance to Hades Vigilant guardian.