Thermolabile is a word that is commonly used in the field of science and refers to any substance or compound that can be destroyed or altered by heat. There are a number of synonyms that can be used for this word, including temperature-sensitive, heat-labile, thermosensitive, and thermal-unstable. All of these terms describe materials or substances that are highly sensitive to temperature fluctuations and may be damaged or destroyed if they are exposed to extreme heat or cold. Other related terms include thermotolerant, heat-stable, and thermoresistant, which describe materials that are able to withstand temperature changes without being damaged.