Is the word related adjective or not?

The word "related" can be both an adjective and a verb, depending on how it's used in a sentence.

As an adjective:

* "They are related by blood." Here, "related" describes the relationship between the people.

As a verb:

* "The two topics are related." Here, "related" indicates a connection between the topics.

So, "related" is not just an adjective. It's both an adjective and a verb.