The term PEP RALLY SOUND is composed of two crossword solutions, CHEER and RAH. CHEER is a five-letter word that is used to express enthusiasm and encouragement. It is often shouted at sporting events or other gatherings. Rah is a three-letter word that is also used to express enthusiasm and excitement. It is usually shouted in unison with others at a pep rally or other large gathering. Together, these two words form the sound of a pep rally, which is a gathering of people to show support for a team or cause.