Crossword clues for the word: ADDN The word ADDN has appeared as an answer to at least 10 crossword clues on different crossword puzzles. Crossword clues for ADDN Showing 1 to 10 of 10 results Clue(s) "Codicil, e.g." Annex, briefly Annex: Abbr. Arith. chore Arith. class lesson Bldg. annex Building annex: Abbr. Postscript: Abbr. Something appended: Abbr. Wing: Abbr.