* Noun: This is the most common use. It refers to unwanted sound, or any kind of disturbance or interference.
* Example: "The loud noise from the construction kept me awake all night."
* Verb: This is less common, but it means to make a noise or to interrupt a sound.
* Example: "The engine noised loudly as it started up."
* Adjective: This is even less common, and it means "characterized by noise."
* Example: "The room was filled with noise laughter and conversation."
So, the part of speech for "noise" depends on how it's being used in the sentence.