Stationary vs stationery are often confused due to their similar spellings, but they have distinct meanings. "Stationary" refers to something that is not moving, like a stationary car or a stationary bike. On the other hand, "stationery" refers to paper, pens, and office supplies. So, when selecting stationery, you're choosing writing materials. To remember the difference, think of the "er" in "stationery" standing for "envelope" or "writing tool." Whether you need to stay stationary at your desk or stock up on stationery for writing, understanding their usage will keep your communication and writing precise.