The term 'Symbol of Holiness' can be represented by the four-letter word 'HALO'. A HALO is a religious symbol that is often depicted in art and literature as a glowing circle or disk of light around the head of a holy figure. It is used to represent holiness, divine power, and spiritual enlightenment. In Christianity, halos are often associated with angels and saints. In other religions, such as Hinduism and Buddhism, halos are also used to represent spiritual figures.