A sterilizer is a device used to eliminate or kill microorganisms, such as bacteria, viruses, and fungi, from various objects or surfaces. It is commonly used in medical facilities, laboratories, and food processing industries to ensure cleanliness and prevent the spread of infections. On the other hand, a distiller is a machine that purifies liquids, typically water, by heating it to create steam and then condensing the steam back into liquid form. This process removes impurities, such as minerals, chemicals, and contaminants, resulting in purified water suitable for consumption or other applications.