Euphonious is a term used to describe a pleasant sound, and it can be defined by five different crossword solutions: SWEET (5 letters), HARMONIOUS (10 letters), MELODIOUS (9 letters), TUNEFUL (7 letters), and MUSICAL (7 letters). SWEET implies a pleasing sound that is gentle and pleasing to the ear, while HARMONIOUS suggests a sound that is balanced and in agreement. MELODIOUS implies a sound that is pleasing and lyrical, while TUNEFUL implies a sound that is melodic and rhythmic. Finally, MUSICAL implies a sound that is pleasing and organized. All of these words together describe the term euphonious, which is a sound that is pleasing and HARMONIOUS.