Crossword clues for the word: BIENNIAL The word BIENNIAL has appeared as an answer to at least 10 crossword clues on different crossword puzzles. Crossword clues for BIENNIAL Showing 1 to 10 of 10 results Clue(s) Describing H.R. elections Every two years Lasting two years Like congressional elections Like national elections Occurring every other year Occurring every second year Plant living two years Plant that lives two years Poison hemlock or Queen Anne's lace