Chanting is a form of vocal expression that involves repeating words or phrases in a rhythmic manner. Intoning, which has 8 letters, is a type of chanting that is done in a solemn and serious way. SINGING, which has 7 letters, is another form of vocal expression that is usually done in a melodic and harmonious way. Intonating, which has 10 letters, is a combination of intoning and SINGING, where the vocalist speaks or sings in a melodic and solemn manner.