Crossword clues for the word: UPSIDEDOWN The word UPSIDEDOWN has appeared as an answer to at least 8 crossword clues on different crossword puzzles. Crossword clues for UPSIDEDOWN Showing 1 to 8 of 8 results Clue(s) """Poseidon Adventure"" position" 1980 50-Across song that hit #1 on the Billboard Hot 100, Disco, and Soul charts (2 wds.) A kind of cake. Cake variety How the answers to this puzzle's starred clues all appear Inverted Like the Poseidon, after the tidal wave Topsy-turvy