Crossword clues for the word: PROLONG The word PROLONG has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for PROLONG Showing 1 to 6 of 6 results Clue(s) Antonym of ''abbreviate'' Drag out Extend Extend the duration of For actress Shelley or Nia? Lengthen