Kettle is both. The german word is "Wasserkocher", but the older metall kettle without any electrical heating is called "Kessel" or "Wasserkessel".

If you are in need, I can try to make a kettle like the one above in the next couple of days, should not be too difficult. Any moving parts required? Switch or top?

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.