The term 'RELATING TO HEARING' can be summarized by two crossword solutions: AUDITORY (8 letters) and AURAL (5 letters). AUDITORY is an adjective that refers to the sense of hearing, or the ability to perceive sound. AURAL is also an adjective that relates to the sense of hearing, but it specifically refers to the perception of sound through the ear. Both terms are used to describe anything related to the sense of hearing, such as medical conditions, technology, and music.