How do you change adjective exchangeable into noun?

There are a few ways to change the adjective "exchangeable" into a noun, depending on the specific meaning you want to convey:

1. Use the noun form directly:

* Exchangeability: This is the most direct and common way. It refers to the quality of being able to be exchanged or substituted.

2. Use a related noun:

* Exchange: This noun refers to the act of exchanging or the place where exchanges occur. It can sometimes be used in a context where "exchangeability" would be suitable.

3. Use a phrase:

* The possibility of exchange: This phrase is more descriptive and emphasizes the potential for exchange.

* The ability to be exchanged: Similar to the phrase above, this emphasizes the capability of being exchanged.

4. Use a metaphorical noun:

* Equivalent: This noun can be used metaphorically to refer to something that is exchangeable due to its similarity or value.

The best choice depends on the context and the specific meaning you want to express.