Other forms: spiritualities
Spirituality has to do with the spirit, not as in ghosts, but as in the essence of being human — your soul or your inner life.
Spirituality often has to do with religion, but it doesn't have to. You might say, "I'm not religious; but I have a strong sense of spirituality," which might mean that you practice yoga or meditation, or you pray with a group, or you nurture your spirit by spending time in nature. Religions usually have defined beliefs, rituals, and guidelines; spirituality is more individual.