(n.) Act of abandoning a person or cause to which one is bound by allegiance or duty, or to which one has attached himself; desertion; failure in duty; a falling away; apostasy; backsliding.

abandonment about-face accommodation adaptation adjustment alienation alteration amelioration apostasy backsliding bad debt betrayal betterment blemish bolt break breakaway bug catch change change of heart changeableness constructive change continuity conversion crack crossing-over default defect deficiency degeneration degenerative change delinquence delinquency dereliction deserter desertion deterioration deviation difference disaffection discontinuity dishonor dishonoring disloyalty disownment divergence diversification diversion diversity divorce drawback estrangement failing failure faithlessness falseness fault faute fitting flaw flip-flop foible forsaking frailty going over gradual change hole imperfection improvement inadequacy infirmity kink little problem melioration mitigation modification modulation nondischarge of debts nonpayment nonremittal overthrow parting problem protest protested bill qualification radical change ratting re-creation realignment recidivation recidivism recreancy redesign reform reformation rejection remaking renewal renunciation repudiation reshaping restructuring reversal revival revivification revolution rift runout schism secession separation shift shortcoming snag something missing sudden change switch taint tergiversation total change transition treason turn turnabout turning traitor uncollectible upheaval variation variety violent change vulnerable place walkout weak link weak point weakness worsening