Pervasive quality is a term used to describe a quality that is present everywhere and in everything. In this crossword, the solutions AROMA (5 letters), AURA (4 letters), and ODOR (4 letters) all refer to a pervasive quality. AROMA is a pleasant smell, AURA is an invisible force or energy surrounding a person or object, and ODOR is an unpleasant smell. All three of these words can be used to describe a pervasive quality.