One of the nice features that Sphinx offers is the ability to define a glossary, such that the entries can be referenced in the rest of the documentation as:

:term:`system profile`

For example: https://docs.python.org/3/glossary.html (from https://github.com/python/cpython/blob/master/Doc/glossary.rst )

This should help disambiguate the multiple different kinds of profile, as well as provide an opportunity to explain relevant Fedora jargon (like dist-git, koji, fedpkg), even when the term isn't specific to the modular build pipeline.