So, I know that a noun equivalent is well, the equivalent of the noun.
In the book that I'm studying from, it mentions that a noun equivalent is a phrase or clause that functions as a noun, but I'm not entirely sure what that would be.
It provides the examples, {To serve your country is honorable} and {Bring whomever you like}, but I'm still not sure what a noun equivalent is.

Would somebody be able to simplify it a lot and really explain this to me?
Also, providing examples and breaking them down would help greatly as well.

Thank you.