Synonyms of astonishing

2 Syllables

startling, wondrous, strangest, striking, turn-on, ripping, stunning

3 Syllables

exciting, empyreal, uncanny, unwonted, amazing, astounding, heartstopping, stupefying, stupendous, surprising, commoving, eye-popping, breathtaking, mind-blowing, mind-boggling, wonderful, marvelous, staggering, unusual, fabulous

4 Syllables

awe-inspiring, awesome, unlooked-for, unpredicted, fantastical, spectacular, razzle-dazzle, impressive, bewildering, miraculous, eye-opening, mind-altering, unexpected, supernormal, supranormal, wonderworking

5 Syllables

unaccountable, unordinary, unbelievable, extraordinary