What is the collective noun for chores?

There isn't a specific, commonly used collective noun for chores. However, you could use some creative options like:

Informal:

* A pile of chores

* A mountain of tasks

* A to-do list

* A mess of chores

More formal:

* A roster of duties

* A suite of responsibilities

* A compendium of tasks

Ultimately, the best choice depends on the context and desired tone.