What part of speech is the word leader?

The word "leader" can be a few different parts of speech, depending on how it's used:

* Noun: This is the most common usage, referring to a person who guides or directs others. Example: "She is a natural leader."

* Adjective: It can describe something that leads or is at the forefront. Example: "The leader dog guided the blind man."

* Verb: It can mean to act as a leader. Example: "He led the team to victory."

So, the specific part of speech depends on the context of the sentence.