Synonyms of astounding

2 Syllables
startling, wondrous, strangest, turn-on, shocking, mondo, whaler
3 Syllables
tremendous, uncanny, portentous, sensorial, appalling, stupefying, stupendous, surprising, confounding, breathtaking, eye-popping, mind-boggling, wonderful, marvelous, mind-blowing, staggering, fabulous
4 Syllables
fantastical, spectacular, razzle-dazzle, astonishing, miraculous, sensational, overwhelming, supernormal, supranormal, wonderworking
6 Syllables
sensationalistic