Common words:
* Altitude: height above sea level
* Attitude: a way of thinking or feeling
* Beatitude: a state of perfect happiness
* Fortitude: courage in facing difficulty
* Gratitude: thankfulness
* Latitude: distance north or south of the equator
* Longitude: distance east or west of the prime meridian
* Magnitude: size or importance
* Multitude: a large number
* Solitude: the state of being alone
* Latitude: freedom to do as one pleases
Less common words:
* Aptitude: natural ability
* Aplomb: self-confidence
* Amplitude: the maximum extent of a vibration or oscillation
* Lassitude: a state of weariness or fatigue
* Magnitude: great size or importance
* Rectitude: moral uprightness
* Servitude: the state of being a slave or servant
* Similitude: likeness or resemblance
* Virtuosity: great skill in music or art
* Vulnerability: the state of being open to attack or harm
Note: "-tude" is a suffix that usually indicates a state, quality, or condition.