Main entry: astounding, dumbfounding, dumfounding
Definition: bewildering or striking dumb with wonder
Main entry: staggering, astonishing, astounding, stupefying
Definition: so surprisingly impressive as to stun or overwhelm
Usage: such an enormous response was astonishing; an astounding achievement; the amount of money required was staggering; suffered a staggering defeat; the figure inside the boucle dress was stupefying