Freeware =! Free software.Free software is software that respects your four essential freedoms [https://www.gnu.org/philosophy/free-sw.html]. Freeware may or may not be non-free, aka proprietary software, so the term doesn't adequately describe Free software.
Likewise, Linux is a kernel. The Linux kernel is often used with the GNU userland, so the system is basically GNU plus Linux, or GNU/Linux.
Cheers
