quality / • n. (pl. -ties) the standard of something as measured against other things of a similar kind; the degree of excellence of something: an improvement in product quality | people today enjoy a better quality of life.
risk / • n. the possibility that something unpleasant or unwelcome will happen. • v. [tr.] expose (someone or something valued) to danger, harm, or loss | take a risk - proceed in the knowledge that there is a chance of something unpleasant occurring.
These are the dictionary definitions, but they don’t address the use of the words as used in the world of business, there are more precise definitions suited to banking, insurance, manufacturing, investment etc..(more)