discharge, n. firing, burst, blast, volley, fusillade, salvo; acquittance, exoneration, quittance, release; fulfillment, observance, performance; dismissal; liquidation, payment evacuation, emission, ejection, exudation, excretion voiding; quietus.

discharged, a. dismissed, acquitted; emeritus.

disciple, n. adherent, follower.

disciplinarian, n. martinet (strict disciplinarian).

discipline, n. correction, chastisement, punishment; submission regulation; martinetism.  Antonyms:  laxity, unrestraint, indulgence.

disclaim, v. disown, deny, disavow, renounce, repudiate.

discomfiture, n. disconcertion, abashment, confusion, frustration, defeat.

discommode, v. inconvenience, incommode, trouble.

discomposure, n. agitation, perturbation, confusion.

disconnect, v. detach, dissever, disjoin, separate.

disconnected, a. detached, separate, isolated, incoherent.

disconnection, n. detachment, disunion, separation, incoherence.

disconsolate, a. inconsolable, broken-hearted.

discontent, n. dissatisfaction, discontentment.  Antonyms:  contentment, satisfaction.

discontented, a. dissatisfied, restless, malcontent, disgruntled

discord, n. dissonance, discordance, inharmony, variance, dissension.  Antonyms:  harmony, agreement, consonance

discordant, a. inharmonious, dissonant, jarring, unmelodious strident; at variance, contradictory, repugnant absonant.

discount, n. deduction, allowance, rebate.

discourage, v. dishearten, dispirit, depress, deter, dampen, unnerve, oppose, dissuade.

discouragement, n. depression, dejection; opposition, dissuasion, intimidation, determent, damper, obstacle, difficulty, barrier.

discouraging, a. depressing, disheartening, dissuasive.

discourse, n. dissertation, address, disquisition, oration, harangue, speech.

discourteous, a. uncivil, rude, disrespectful, abrupt, unmannerly, boorish, inurbane.

discourtesy, n. rudeness, incivility, inurbanity, impoliteness.

discover, v. ascertain, detect, unearth, descry, discern, disclose, ferret out.

discovery, n. ascertainment, detection, unearthing, disclosure.

discredit, n. disesteem, disrepute, unpopularity.

discreet, a. prudent, circumspect, wary, judicious.

discretion, n. prudence, circumspection, wariness; choice, liberty, will.  Antonyms:  indiscretion, imprudence, compulsion, constraint, coercion.

discretional, a. optional, discretionary, elective.  Antonyms:  compulsory, obligatory.

discriminating, a. distinguishing, differential, discriminative.

discrimination, n. difference, distinction, discernment, judgment.  Antonyms:  indiscrimination, promiscuity, undiscernment.

discuss, v. debate, argue, canvass, agitate, moot, deliberate.