Crossword clues for the word: TRANSONIC The word TRANSONIC has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for TRANSONIC Showing 1 to 4 of 4 results Clue(s) Having Mach speed Moving at 700-780 m.p.h. at sea level Of aeronautical speeds between 600 and 900 MPH. Of aeronautical speeds.