What is another word for biome?

There isn't a single perfect synonym for "biome", as it's a unique and specific term. However, depending on the context, you could use words like:

* Ecosystem: This is a broader term that encompasses the living organisms and their physical environment.

* Biogeographic region: This emphasizes the geographical distribution of life.

* Ecological zone: This highlights the distinct environmental conditions of a biome.

* Life zone: This emphasizes the specific types of life found in a biome.

* Major habitat type: This is a simpler term that describes the overall environment of a biome.

The best word to use will depend on the specific meaning you want to convey.