@youronlyone you described “flavor” exactly how I’ve seen the usage over my 20 years of Linux.
Flavor, to me, was a combination of the DE and the pre-installed package set. And different flavors were all part of one base distro (this reminds me that Debian, Red Hat, Slack were “base distros”for a time). Even Ubuntu was a flavor of Debian at the start, but quickly grew out from that to probably be its own base distro.