Is the word explained a noun?

The word "explained" is not a noun. It's the past participle of the verb "explain".

Here's why:

* Nouns name people, places, things, or ideas.

* Verbs describe actions or states of being.

* Past participles are used to form perfect tenses (e.g., "have explained") or passive voice (e.g., "The problem was explained").

Example:

* Verb: "He explained the rules."

* Past Participle: "The rules were explained clearly."

If you want to use a noun related to the concept of explaining, you could use words like:

* Explanation: "He gave a clear explanation."

* Exposition: "The book provided a detailed exposition of the theory."

* Clarification: "She requested clarification on the instructions."