penitence (n.)

• acknowledgment
• anguish
• apology
• asceticism
• attrition
• compunction
• confession
• contriteness
• contrition
• debasement
• degradation
• distress
• excuse
• fasting
• flagellation
• grief
• humiliation
• lustration
• maceration
• mortification
• penance
• purgation
• purgatory
• qualm
• reformation
• regret
• regrets
• remorse
• repentance
• rue
• ruefulness
• ruth
• sadness
• scruple
• self-accusation
• self-punishment
• self-reproach
• shame
• sorrow
• sorrowfulness