Coolness vs Coolth - What's the difference?

As nouns the difference between coolness and coolth

is that coolness is (uncountable) the state of being cool, as in chilly while coolth is the state of being cool, temperature-wise; coolness.

(en-noun)

(uncountable) The state of being cool, as in chilly.

(countable) The result or product of being cool, as in chilly.

(slang, uncountable) The state of being cool, as in good or pleasing.

(slang, countable) The result or product of being cool, as in good or pleasing.

(-)

The state of being cool, temperature-wise; coolness.

* 1842 , (Fanny Burney), Diary and Letters of Madame D'Arblay :

In the evening my father and Mrs Thrale seated themselves out of doors, just before the Blue-room windows, for coolth and chat; […]

* 1901 , (Rudyard Kipling), Kim :

Through the speckled shadow of the great deodar-forests […] and back into the woodlands’ coolth again […]

* 1982 , (Lawrence Durrell), Constance'', Penguin 2004 (''Avignon Quintet ), p. 628:

The water pushed large blocks of tepid air about around his chair, giving the faint illusion of freshness and coolth .

* 2012 , David Crichton, Fergus Nicol, Adapting Buildings and Cities for Climate Change :

This they do, not only convectively by passing cooler air over the skins of building occupants, but also using radiant coolth .