"Artwork" is usually two words when it's used as a noun. For example:
* "I saw some beautiful artwork at the museum."
* "The artwork in her studio was impressive."
"Artwork" is one word when it's used as an adjective. For example:
* "That's an artwork table."
* "She's a well-known artwork dealer."
It's a common mistake to use "artwork" as a singular noun, but it's grammatically incorrect. It refers to a collection of pieces, not one individual piece.
Here's a simple rule of thumb:
* If you're referring to a piece of art, use the singular noun "art piece" or "piece of art."
* If you're referring to a collection of art, use "artwork."
Remember that context is key! Pay attention to how the word is used in the sentence to determine whether "artwork" should be one word or two.