There are several synonyms for the word "Pleurotus Ostreatus," which is a type of edible mushroom commonly known as the oyster mushroom. Some of the commonly used synonyms for Pleurotus Ostreatus are Hiratake, Tree Oyster, Tamogitake, and Straw Mushroom. These mushrooms are very popular in Asian and European cuisine due to their mild, earthy flavor. They are often used in soups, stir-fries, and pasta dishes. In addition to their delicious taste, oyster mushrooms are also known for their health benefits, including their high protein content, low calorie count, and ability to boost the immune system.