DNWL: Other examples are a good saint, a hot steam engine, an obese fatman or a government politician.

OT: Getting hooked at your "hot steam engine", some phrases seem to be tautologies, but are not. You might guess that with its 350 ℃ operating temperature your usual pressurized nuclear reactor is of course a "high-temperature reactor". Alas, it is not. A high-temperature reactor has about 700 ℃ or even much more.