Astounding
Part of speech: adjective
Definition: That astounds or astound.
Part of speech: verb
Definition: To astonish, bewilder or dazzle.
Example sentence: For every Tesla or Uber, there's a Valeant Pharmaceuticals or Theranos - two story stocks that seduced an astounding array of prominent investors and supporters based on stories that did turn out to be too good to be true.
Stupefying
Part of speech: verb
Definition: To dull the senses or capacity to think thereby reducing responsiveness; to dazzle or stun.