Nabi And Rasul
There are no definitions in Quran and Sunnah. Definitions are made by the human beings for academic purposes. The difference of nabi and Rasool has been indicated in the Qur’an. See the verses 22.52. Then scholars tried to understand the difference between the two. Different scholars reached different opinions. We have our understanding.
Please watch the argument in the following video https://youtu.be/rmHjpR_T_nk?si=Myf5W3YSiE00z4EI