different between funniness vs ludicrousness

English

From funny +? -ness

funniness (countable and uncountable, plural funninesses)

(uncountable) The quality of being funny.
(countable) Something funny; a quirky or amusing statement, mannerism, etc.
- 1971, Sheila Kaye-Smith, Joanna Godden Married, and Other Stories
  Gone were the human funninesses and kindnesses of the London gutter child...

ludicrous +? -ness

ludicrousness (countable and uncountable, plural ludicrousnesses)

The state or quality of being ludicrous.
- 1879, John McElroy, Andersonville, ch. 51,
  The full ludicrousness of the thing dawned upon me so forcibly that I forgot all about my excitement and scare, and laughed aloud.

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