What is the noun of different?

There isn't a single noun that perfectly encapsulates the meaning of "different." However, depending on the context, you could use several words that get close:

* Difference: This is the most common and straightforward option. It refers to the state of being different or the specific way in which things are not alike.

* Variety: This emphasizes the presence of many different things.

* Diversity: This suggests a wide range of differences, often implying positive aspects like richness and inclusion.

* Distinction: This emphasizes a clear and significant difference.

* Disparity: This implies a significant and often unfair difference.

The best choice will depend on the specific situation and the nuances you want to convey.