What is the antonym of museum?

There isn't a perfect antonym for "museum" in the same way that there is for words like "hot" and "cold". However, depending on the context, some possible alternatives are:

* Private collection: This refers to a collection of objects owned by an individual or family, rather than a public institution.

* Warehouse: This is a place where goods are stored, contrasting with a museum's focus on display and preservation.

* Destruction: This is the opposite of the museum's function of protecting and preserving artifacts.

* Natural environment: This is the opposite of the museum's artificial environment, where objects are displayed out of their original context.

Ultimately, the best antonym for "museum" will depend on the specific situation and what you're trying to communicate.