Can the word Satan be an adjective?

While "Satan" is primarily a noun, it can be used as an adjective in informal contexts. It's not grammatically incorrect, but it might be considered unconventional or unprofessional.

Here's an example:

* Informal: "That was a Satan-like grin."

* More formal: "That was a demonic grin."

It's important to consider the context and audience when using "Satan" as an adjective. In most situations, there are more appropriate alternatives.