asceticism (n.)

• abstemiousness
• abstention
• abstinence
• avoidance
• celibacy
• chastity
• continence
• fast
• fasting
• flagellation
• gymnosophy
• lustration
• maceration
• mortification
• penance
• penitence
• purgation
• purgatory
• repentance
• teetotalism
• vegetarianism