Pu-erh tea is a type of traditional Chinese tea that is becoming increasingly popular in the Western world. This tea has a unique earthy flavour that is different from other traditional teas. There are several synonyms for this tea, which include post-fermented tea, dark tea, aged tea, and black tea. Post-fermented tea refers to the tea that has gone through a fermentation process after it has been dried and processed. Dark tea and aged tea refer to the dark colour of the tea and its age. The term black tea is also used to describe this tea, although it is important to note that it is not the same as the black tea commonly drunk in the Western world.