Superior quality is a term used to describe products or services that are of the highest quality. PREMIUM, AONE, and HIGHGRADE are all terms that can be used to describe superior quality. PREMIUM is a 7-letter word that is used to describe something of the highest quality, usually with a higher price tag. AONE is a 4-letter word that is used to describe something of the highest quality, usually with a higher price tag. HIGHGRADE is a 9-letter word that is used to describe something of the highest quality, usually with a higher price tag. All three words are used to describe products or services of superior quality.