different between dampness vs exudate

English

damp +? -ness

dampness (usually uncountable, plural dampnesses)

Moderate humidity; moisture; moistness.
The degree to which something is damp or moist.
The dampness in the writing paper caused the ink to spread and smudge.

exude +? -ate

exudate (plural exudates)

A fluid that has exuded from somewhere; especially one that has exuded from a pore of an animal or plant.
- 1861 Stephen Jennings Goodfellow - Lectures on the Diseases of the Kidney, Generally Known as Brights Disease, and Dropsy
  The whitish lines of exudate seem at times to penetrate even between the straight tubes . . .
- 2005 Selma Tibi - The Medicinal Use of Opium in Ninth-century Baghdad
  When this is done, one should leave the poppy for some time, then return to it and gather any further exudate.

exudate (third-person singular simple present exudates, present participle exudating, simple past and past participle exudated)

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