amaze, astound, astonish

•  amaze

• 
   verb [T]

to make someone feel very surprised:

?Kay amazed her friends by saying she was getting married.

• astonish

•  verb [T]

to surprise someone very much:
?Martina's speed and agility astonished her opponent.

• astound

•  verb [T]

to make someone feel extremely surprised or shocked:
?Berger's fans were astounded by his decision to quit.