Good day, I am currently working on a 3D adventure platformer that's in a demo building stage and wanted to know if there is any type of list for terms I can look into to help be specific when describing certain areas or mechanics when looking for help?

For example when it comes to some games having a separate location in the same level what is that called?

I would figure it's called a sub-area but I don't think that's right but would like to study up for better understanding.