* The Wright brothers' first successful airplane was a monoplane**.
* The monoplane soared gracefully through the clear blue sky.
* He took flying lessons in a small monoplane at the local airfield.
* The monoplane landed smoothly on the grass runway.
* The design of a monoplane is simple and efficient, making it ideal for small aircraft.
Let me know if you'd like more examples or have other word choices you want to use in sentences!