Crossword clues for the word: EFFECTIVE The word EFFECTIVE has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for EFFECTIVE Showing 1 to 5 of 5 results Clue(s) Able to accomplish a purpose Fighter plane brought in faulty, not initially operational Opposite of [circled letters] Powerful canine welcomed by vet if fee's high Producing the desired result