As adjectives the difference between droughtproof and draughtproof
is that droughtproof is resistant to drought while draughtproof is that prevents the access of draughts.
As a verb draughtproof is
to seal an opening, so as to prevent the access of draughts.
draughtproof
English
Alternative forms
* draught-proof
Adjective
(
en adjective)
That prevents the access of draughts
Verb
(
en verb)
To seal an opening, so as to prevent the access of draughts