What is the proper noun for student?

There isn't a single proper noun for "student." Proper nouns are specific names for people, places, or things.

If you're looking for a way to make "student" more specific, you could use:

* A student's name: "John Smith is a good student."

* A student's role or group: "The senior students are preparing for their final exams."

* A student's institution: "Harvard students are known for their academic excellence."

Let me know if you have more context, and I can help you find the right word!