What is a phrase that ends in -ing and functions as noun?

Here are some phrases that end in "-ing" and function as nouns:

* Singing (the act of singing)

* Dancing (the act of dancing)

* Learning (the act of learning)

* Waiting (the act of waiting)

* Running (the act of running)

* Swimming (the act of swimming)

* Shopping (the act of shopping)

* Baking (the act of baking)

* Fishing (the act of fishing)

* Writing (the act of writing)

These are all examples of gerunds, which are verb forms that function as nouns. They can be used as the subject of a sentence, the object of a verb, or the object of a preposition.