The difference between "stationary vs stationery" lies in their spelling and meaning. "Stationary" refers to something that is not moving or fixed in one place, such as a stationary object. It can also describe a person or thing that is still or immobile. On the other hand, "stationery" refers to writing materials, including paper, envelopes, pens, pencils, and other office supplies. Stationery is used for writing, correspondence, and other office or personal purposes. So, while "stationary" describes something that is not moving, "stationery" refers to writing materials and supplies.