hajj: the fifth pillar of Islam is a pilgrimage to Mecca during the month of Dhu al-Hijja; at least once in a lifetime a Muslim is expected to make a religious journey to Mecca and the Kaaba
pilgrimage: a journey to a sacred place
pyramiding: a fraudulent business practice involving some form of pyramid scheme e.g., the chain of distribution is artificially expanded by an excessive number of distributors selling to other distributors at progressively higher wholesale prices until retail prices are unnecessarily inflated