I have a changed a project that has many many many bugs because of outdated code that kept it from working. In the process, I changed the structure of some feature implementations in order to get the application to work again. Can this be considered refactoring, or is it just a special kind of bugfixing?

Also, can I call something a rewrite even though I'm not actually writing anything, just using a GUI environment to create the same functionality again?

I need this because I'm writing about what I'm doing for my university and I can't find it on google - I guess it's opinion based.