Crossword clues for the word: MASTIFFS The word MASTIFFS has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for MASTIFFS Showing 1 to 7 of 7 results Clue(s) Boxers’ kin Dogs fight during church service Dogs with dark muzzles Guarders with droopy ears and pendulous lips Large dogs Large watchdogs Large working dogs