* Verb: This is the most common usage. It means to communicate by writing letters, to match or be similar, or to be in agreement.
* Example: "They correspond regularly."
* Example: "The two accounts correspond."
* Noun: This usage is less common but still valid. It refers to the act of writing letters or the letters themselves.
* Example: "I receive correspond from my friend every month."
Let me know if you have a specific sentence in mind, and I can help you determine the part of speech for "correspond" in that context.