Homophones are words that sound alike, may have the same spelling, but differ in meaning.
Drought means dry, arid, famine, dearth, lack, etc.
Draught means air current, a dose of liquid, etc.
The farmers of the drought-hit areas sought help from the Government.
His gold medal ended his country’s decade-long international medal drought.
The cold draught was coming from a hole in the roof.
He had a draught of ale in the morning.