One way to remember which word is which is to think of the 'er' in 'paper' as matching the 'er' in 'stationery'. Most simply, stationary is an adjective that means "not moving," and stationery is a noun that means "paper for writing letters."

The difference between “stationary” and “stationery” is simple. “Stationary” refers to something that is not moving or fixed in one place. For example, a parked car is stationary because it’s not going anywhere. On the other hand, “stationery” relates to writing materials, like paper and envelopes.

“Stationary” and “stationery” are often confused, especially in writing. “Stationary” refers to something that is not moving or not intended to be moved. “Stationery”, on the other hand, refers to materials used for writing, such as paper and pens.

Stationary is an adjective that means “not moving or not intended to be moved,” while stationery is a noun that refers to writing materials such as paper, envelopes, and pens. The difference between these two words lies in the placement of the “a” and “e” in their spellings.

Stationary, with an a, is an adjective only. It means not moving or not capable of being moved. Stationery, with an e, is a noun only. It refers to writing paper and envelopes. In North America, it’s usually used in reference to paper and materials for writing letters.