What part of speech is the word fault?

The word "fault" can be several parts of speech depending on how it's used in a sentence:

* Noun: This is the most common usage. It refers to a flaw, error, or defect.

* Example: "It was his fault that the project failed."

* Verb: This is less common but still valid. It means to find fault with someone or something, or to blame.

* Example: "Don't fault him for being late; the traffic was terrible."

Let me know if you have a specific sentence in mind, and I can tell you which part of speech "fault" is in that context!