How the word swallow act as a noun?

The word "swallow" can act as a noun in a few different ways:

1. The bird:

* "The swallow flew over the field." Here, "swallow" refers to the bird species.

2. The act of swallowing:

* "The doctor asked me to take a swallow of water." This uses "swallow" to describe the act of taking something into your mouth and sending it down your throat.

3. A small drink:

* "He took a quick swallow of his coffee." This is a more informal way of referring to a small drink, often used when describing a quick drink.

4. A type of sailboat:

* "The swallow is a type of small, fast sailboat." This is a more specific use of the word, referring to a particular type of boat.

So, the word "swallow" can be a noun depending on the context and what it's referring to.