* Noun: This is the most common usage. It refers to the act of writing words correctly, or the way in which a word is written.
* Example: "I need to check my spelling."
* Verb: It can also be a verb, meaning to write the letters of a word in the correct order.
* Example: "Can you spell your name?"
* Adjective: While less common, it can be used as an adjective to describe something related to spelling.
* Example: "He has a spelling bee competition today."
So, without context, it's hard to determine the exact part of speech.