contrition (n.)

• acknowledgment
• apology
• attrition
• bitterness
• compunction
• confession
• contriteness
• excuse
• grief
• penance
• penitence
• regret
• regrets
• remorse
• repentance
• rue
• ruth
• shame
• shamefacedness
• shamefulness
• sorriness
• sorrow
• wistfulness