Deaerate refers to the process of removing air or gas from a substance. There are various synonyms that can be used instead of deaerate such as depurated, purged, cleansed, emptied, and exhaled. Depurated means to purify or cleanse something, while purged means to rid something of unwanted substances. Cleansed is similar in meaning, as it involves removing impurities from a substance. Emptied refers to completely removing all contents from a container or space, while exhaled refers to expelling air or gases from a substance. Other synonyms that can be used instead of deaerate include decant, defoam, and remove gas. Decant means pouring off a liquid from a mixture, while defoaming involves removing excess foam or gas from a substance. Remove gas means eliminating gases from a substance, like in deaeration.