As adjectives the difference between droughty and drouthy
is that droughty is lacking rain while drouthy is (scotland) droughty, dry.
droughty
English
Adjective
(
er)
Lacking rain.
(archaic) dry; thirsty
- Thy droughty throat. — Philips.
drouthy
English
Adjective
(er)
(Scotland) droughty, dry
(Scotland) thirsty