From The Collaborative International Dictionary of English v.0.48 [gcide]:
Drouth \Drouth\, n.
Same as Drought. --Sandys.
[1913 Webster]
Another ill accident is drouth at the spindling of
corn. --Bacon.
[1913 Webster]
One whose drouth [thirst],
Yet scarce allayed, still eyes the current stream.
--Milton.
[1913 Webster]
In the dust and drouth of London life. --Tennyson.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
drouth
n 1: a prolonged shortage; "when England defeated Pakistan it
ended a ten-year drought" [syn: drought, drouth]
2: a shortage of rainfall; "farmers most affected by the drought
hope that there may yet be sufficient rain early in the
growing season" [syn: drought, drouth]