"the report shows a surprising lack of hard factual data"; "leaped up with surprising agility"; "she earned a surprising amount of money"
is similar to
surprising greatly
"she does an amazing amount of work"; "the dog was capable of astonishing tricks"
is similar to
so remarkably different or sudden as to cause momentary shock or alarm
"Sydney's startling new Opera House"; "startling news"; "startling earthquake shocks"
is similar to
causing great astonishment and consternation
"the strike came as a stunning protest against management"; "a stunning defeat"
see also
not expected or anticipated
"unexpected guests"; "unexpected news"