What is the collective noun for word advice?

There isn't a widely accepted collective noun for "advice". However, you could use phrases like:

* A body of advice

* A wealth of advice

* A storehouse of advice

* A collection of advice

* A compendium of advice

You can also use more specific nouns depending on the context, such as:

* A guidebook (if it's written advice)

* A lecture (if it's spoken advice)

* A wisdom (if it's wise advice)

Ultimately, the best phrase to use will depend on the specific situation and the type of advice you are talking about.