Common words:
* ability
* possibility
* probability
* liability
* mobility
* flexibility
* responsibility
* similarity
* diversity
* fertility
* utility
* stability
* opacity
* durability
* solubility
Less common words:
* agility
* facility
* hospitality
* hostility
* infidelity
* senility
* volatility
* viability
* feasibility
* tranquility
* tenacity
Remember: The suffix "-ility" usually indicates a quality, state, or capacity.