Here are some examples:
* Quality: The state of being good or bad.
* Clarity: The state of being clear and easily understood.
* Creativity: The state of being imaginative and original.
* Security: The state of being safe and protected.
Keep in mind that not all words ending in "-ity" describe quality. Some describe other concepts, such as reality (the state of being real) or capacity (the ability to hold or contain something).