Meaning : Surprising greatly.
Example :
She does an amazing amount of work.
The dog was capable of astonishing tricks.
Synonyms : amazing
Meaning : So surprisingly impressive as to stun or overwhelm.
Example :
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.
Synonyms : astounding, staggering, stupefying