Here are some examples:
* Magnitude: The state of being large or important.
* Attitude: A state of mind or feeling.
* Altitude: The state of being high up.
* Fortitude: The quality of courage in the face of difficulty.
* Latitude: The condition of being north or south of the equator.
The "-tude" suffix often appears in words derived from Latin, although it's also used in words from other languages.