derogation - Bouvier's Law Dictionary, Revised 6th Ed (1856) :

DEROGATION, civil law. The partial abrogation of a law; to derogate from a
law is to enact something which is contrary to it; to abrogate a law is' to
abolish it entirely. Dig. lib. 50, t. 17, 1. 102. See Abrogation.

derogation - Moby Thesaurus II by Grady Ward, 1.0 :

78 Moby Thesaurus words for "derogation":
attrition, belittling, comedown, contempt, curtailment, cut,
cutting, debasement, decadence, decadency, declension, declination,
decline, decrease, decrement, decrial, deformation, degeneracy,
degenerateness, degeneration, degradation, demotion, depletion,
depravation, depravedness, depreciation, descent, deterioration,
detraction, devolution, diminution, dip, disapproval, discrediting,
disgrace, disparagement, downtrend, downturn, downward mobility,
downward trend, drop, dying, ebb, effeteness, extraction, fading,
failing, failure, failure of nerve, faint praise, fall,
falling-off, impairment, indignity, involution, knocking, lapse,
lessening, loss of tone, lukewarm support, minimizing,
putting down, reduction, regression, remission, retraction,
retrenchment, retrocession, retrogradation, retrogression,
shortening, shrinkage, slighting, slippage, slump, sour grapes,
truncation, wane.