different between cataclysmic vs blighting

English

From cataclysm +? -ic.

cataclysmic (comparative more cataclysmic, superlative most cataclysmic)

Of or pertaining to a cataclysm; causing great destruction or upheaval; catastrophic.
It is believed that a cataclysmic impact caused the extinction of the dinosaurs.
- 2005, Edmund White, My Women
  That’s why to be rejected in love was so cataclysmic: one had been judged and found wanting.

blighting

blighting (plural blightings)

The act by which something is blighted.
- 1897, Mark Twain, Following the Equator
  They showed signs of the blightings and blastings of time, in their outward aspect, but they were young within; young and cheerful, and ready to talk […]

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