Can A verb form ending in -ing and used as a noun is participle?

Not quite! A verb form ending in -ing and used as a noun is called a gerund.

Here's the breakdown:

* Gerund: A verb form ending in -ing that functions as a noun.

* Participle: A verb form that can act as an adjective or part of a verb phrase.

Here's an example to illustrate:

* Gerund: "Swimming is my favorite exercise." (Swimming is the noun subject of the sentence)

* Participle: "The swimming girl is my sister." (Swimming modifies the noun "girl" and acts as an adjective)

Let me know if you'd like more examples or have any other questions!