quality = an essential or distinctive characteristic, property or attribute. characteristic = a distinguishing feature or quality. trait = distinguish characteristic or quality, especially if one's personal nature. the more common use of them would be I guess: A trait of a murderer is his/her lack of empathy.
Attribute is defined as a quality or characteristic of a person, place or thing. Intelligence, charm and a sense of humor are each an example of an attribute.
Quality attributes. Notable quality attributes include: accessibility. accountability. accuracy. adaptability. administrability. affordability.