different between coruscation vs fulmination

English

coruscation (countable and uncountable, plural coruscations)

A sudden display of brilliance; a flashing of light; a sparkle.
- 1837 Thomas Carlyle, The French Revolution: A History
  [I]n the dusky galleries, duskier with unwashed heads, is a strange 'coruscation,'—of impromptu billhooks.
- 2001, Oliver Sacks, Uncle Tungsten: Memories of a Chemical Boyhood, Alfred A. Knopf (2001), 6,
  All of these things - the rubbed amber, the magnets, the crystal radio, the clock dials with their tireless coruscations - gave me a sense of invisible rays and forces, a sense that beneath the familiar, visible world of colors and appearances there lay a dark, hidden world of mysterious laws and phenomena.

From Middle French fulmination

fulmination (countable and uncountable, plural fulminations)

The act of fulminating or exploding; detonation.
The act of thundering forth threats or censures, as with authority.
- 1919, H. L. Mencken, The American Language, chapter 23
  It is curious, reading the fulminations of American purists of the last generation, to note how many of the Americanisms they denounced have not only got into perfectly good usage at home but even broken down all guards across the ocean.
That which is fulminated or thundered forth; vehement menace or censure.

fulmination f (plural fulminations)

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