Why is desert for food and desert sand same spelling?

Answer 1

They are not spelled the same.

A desert is the one with sand and one S.

The sweet you eat is a dessert with two S's.

To remember, ask yourself - which would you like to have two of.

Answer 2

The words "desert" (referring to a barren, arid region) and "dessert" (referring to a sweet course typically served after a meal) have different meanings and pronunciations, but they are homophones, which means they sound the same. They happen to have the same spelling due to historical linguistic changes and evolutions of language over time. This kind of linguistic phenomenon is not uncommon in English and can lead to confusion or misinterpretation.