Crossword clues for the word: SISS The word SISS has appeared as an answer to at least 10 crossword clues on different crossword puzzles. Crossword clues for SISS Showing 1 to 10 of 10 results Clue(s) "Before ""boom, bah""" k.d. lang and The ___ Boom Bang Leaking radiator's sound Make a hissing sound. Make a sibilant sound Puncture sound Sib of bro Sibilant sound of derision Sound of a reptile or steam Sound of escaping steam