Crossword clues for the word: BLACKADDER The word BLACKADDER has appeared as an answer to at least 3 crossword clues on different crossword puzzles. Crossword clues for BLACKADDER Showing 1 to 3 of 3 results Clue(s) Any dark square that's put in just to make the constructing job easier? Puzzlemaker who uses way too many dark squares? Venomous European viper