astonisher

1. Something that astonishes; an astonishing thing or event.

   (colloquial)

2. Someone who astonishes.

3. (US)An exclamation mark, the punctuation mark “!”.

   1874, The American Observer, New Series, Volume 1, “Rejoinder,” p. 525, “ […] Nothing whatever” ! (the italics are “S. S. C.’s,” the “astonisher” is mine.)

4. (US)A short line of smaller type above (or sometimes below) the main headline of an article, usually placed flush-left.

5. A headline or lead (introductory paragraph) designed to capture attention through a surprising statement.

regular