What is a synonym for niche?

Here are some synonyms for niche, depending on the context:

General:

* Specialty

* Area

* Domain

* Field

* Sector

* Market

* Role

* Position

Specific to business/marketing:

* Target market

* Customer segment

* Market segment

Specific to ecology:

* Habitat

* Ecological role

* Ecological niche

More informal:

* Spot

* Place

* Space

The best synonym for "niche" will depend on the specific context of your sentence. Consider what aspect of "niche" you are trying to emphasize when choosing a synonym.