banishment, blackballing, comedown, concavity, de-escalation, debasement, decadence, decadency, declension, declination, decline, deformation, defrocking, degeneracy, degenerateness, degeneration, degradation, depluming, deportation, depravation, depravedness, depreciation, depression, deprivation, derogation, descent, deterioration, detrusion, devolution, diminution, disbarment, disfellowship, displuming, downgrading, downtrend, downturn, downward mobility, downward trend, drop, ducking, dying, ebb, effeteness, exclusion, excommunication, exile, expatriation, extradition, fading, failing, failure, failure of nerve, fall, falling-off, fugitation, hauling down, hollowness, humbling, humiliation, involution, lapse, loss of tone, lowering, ostracism, ostracization, outlawing, outlawry, reduction, regression, relegation, retrocession, retrogradation, retrogression, rustication, sinking, slippage, slump, stripping, submergence, suspension, thrusting under, transportation, unfrocking, wane

For further exploring for "demotion" in Webster Dictionary Online