Pyrometry is the measurement of high temperatures. If you're looking for synonyms for pyrometry, you could try searching for alternative terms used in the field of temperature measurement or thermometry. Some possible synonyms for pyrometry include thermal measurement, infrared thermography, or thermographics. These terms may be used interchangeably with pyrometry, depending on the specific context and application. Other related terms might include radiometry, thermomechanical analysis, or thermocouple, which all relate to various aspects of temperature and heat measurement. Whatever your specific needs, there are certainly many different synonyms and related terms you can use when discussing the science of temperature measurement and pyrometry.