sonic barrier

= sound barrier (sound).

someway, somewhat, somewhere, somnambulism, somnambulist, somnolence, somnolent, somnolently, son, son et lumiere, son-in-law, sonar, sonata, song, song-book, songbird, songster, songstress, songwriter, sonic, sonic boom, sonnet, sonny, sonority, sonorous, sonorously, soon, sooner or later, soot, soothe, soothing, soothsayer, sooty, sop, sophism, sophist, sophisticate, sophisticated, sophistication, sophistry,