Here are some options depending on context:
If you mean "deserts" as a type of biome:
* Arid lands
* Drylands
* Wastelands (can have negative connotations)
* Barren lands
* Sandy regions
* Steppe (specifically for a dry grassland)
If you mean "deserts" as something that is given away for free:
* Gifts
* Complimentary items
* Freebies
* Bonuses
* Handouts (can have negative connotations)
If you mean "deserts" as the act of abandoning someone:
* Abandonment
* Forsaking
* Leaving behind
* Neglecting
* Disregarding
If you mean "deserts" as a lack of something:
* Deprivation
* Want
* Scarcity
* Deficiency
If you mean "deserts" in a more general sense, like "the deserts of time":
* Vastness
* Emptiness
* Solitude
* Isolation
* Uncharted territories
Please give me more context about what you're looking for, and I can help you find the perfect word!