| Dally | procrastinate, to act playfully or waste time |
| Dank | damp |
| Dappled | spotted |
| Dastard | A base coward |
| Daub | to paint carelessly, to smear |
| Daunt | to frighten, subdue |
| Dauntless | courageous |
| Dawdle | to waste time by trifling, to move slowly |
| Deadpan | expressionless |
| Debase | to degrade, or lower in quality or stature |
| Debauch | to corrupt, seduce from virtue or duty |
| Debenture | bond issued to secure a loan |
| Debonair | sophisticated, affable |
| Debutante | a girl debuting into society |
| Decadence | deterioration, decay (e.g. moral or cultural) |
| Decant | pour |
| Decapitate | kill by beheading |
| Deciduous | shedding leaves, short-lived, temporary |
| Declivity | a place that declines or slopes downwards |
| Décolleté | having a low-necked dress |
| Decorous | seemly, proper, tasteful, socially correct |
| Decrepit | Enfeebled, as by old age or some chronic infirmity |
| Decrepitude | enfeeblement |
| Decry | castigate, to belittle, openly condemn |
| Deducible | derived by reasoning |
| Defalcate | to misuse money put in trust |
| Defamation | slander |
| Defection | desertion |
| Deference | courteously yielding to another, respect, honor |
| Defile | pollute, to make unclean or dishonor |
| Deflect | turn aside |
| Defray | pay |
| Deft | skillful, dexterous |
| Defunct | extinct, no longer existing, dead |
| Deify | to regard as a god |
| Deign | condescend |
| Deleterious | harmful, destructive, detrimental |
| Deliquescent | capable of absorbing moisture from air and becoming liquid |
| Delirium | mental confusion, ecstasy |
| Deluge | a flood, to submerge, overwhelm |
| Delusion | Mistaken conviction |
| Delusive | deceptive, raising vain hopes |
| Delve | dig, explore (of ideas) |
| Demagogue | an unprincipled politician, leader |
| Demean | to degrade, humiliate, humble |
| Demeanor (British = demeanor) | behavior |
| Demented | deranged |
| Demesne | domain |
| Demolition | destruction |
| Demoniacal | related to evil spirits, devilish |
| Demur | take exception, to express doubts or objections |
| Demure | sedate, reserved |
| Denigrate | defame, to slur or blacken someone's reputation |
| Denizen | dweller |
| Denotation | the exact literary meaning of a word, designation, definition |
| Denouement | resolution |
| Depilate | remove hair |
| Depose | testify, to remove from a high position |
| Deposition | testimony |
| Depravity | immorality, sinfulness |
| Deprecate | belittle, disparage |
| Depreciate | to lessen the worth of |
| Depredation | preying on, plunder |
| Deranged | insane, delirious, maniacal |
| Derelict | negligent |
| Deride | to ridicule, to mock, make fun of |
| Derision | Ridicule |
| Derivative | copied or adapted, not original |
| Dermatologist | one who studies the skin and its diseases |
| Descant | discuss fully |
| Descry | to discern, to discover or reveal |
| Desecrate | profane, to abuse something sacred |
| Desiccate | dehydrate, to dry completely |
| Desideratum | that which is desired |
| Desolate | forsaken |
| Despoil | to bereave, rob, plunder, strip of possessions |
| Despondent | depressed, feeling discouraged and dejected |
| Despotism | any severe and strict rule |
| Desuetude | disuse |
| Desultory | without direction in life, at random, rambling, unmethodical |
| Detergent | cleansing agent |
| Determinate | definitely limited or fixed, conclusive |
| Detonation | explosion |
| Devolve | to roll down, to hand down |
| Dexterous | skillful, adroit |
| Diadem | crown |
| Dialectic | pertaining to debate |
| Diatribe | long denunciation, bitter verbal attack |
| Dichotomy | a division into two parts |
| Didactic | instructional |
| Diffidence | shyness, lack of confidence |
| Dilettante | amateur, dabbler |
| Diminution | Reduction |
| Dint | means, effort |
| Dipsomaniac | a person having an uncontrollable desire for alcohol, inebriate |
| Dirge | lament with music, funeral hymn |
| Disabuse | correct, to free from a misconception |
| Disapprobation | rejection, disapproval |
| Disavowal | Denial |
| Disburse | pay out |
| Discomfit | to put to confusion, discomfort |
| Disconcert | confuse |
| Disconsolate | inconsolable, unable to be consoled, extremely sad |
| Discordant | harsh-sounding, badly out of tune |
| Discrete | separate, distinct |
| Discretion | prudence |
| Discursive | rambling, wandering from topic to topic |
| Disdain | to regard with scorn and contempt |
| Dishabille | in a state of undress |
| Dishearten | discourage, lose spirit |
| Dishevel | muss |
| Disingenuous | deceptive, sly and crafty |
| Disinter | unearth |
| Disinterested | Impartial |
| Disjointed | disconnected, incoherent, being separated |
| Dismember | cut into small parts |
| Disparage | belittle, speak disrespectfully about |
| Disparate | various, dissimilar, different in kind |
| Disparity | difference, contrast, dissimilarity |
| Dispirit | discourage, to dishearten, make dejected |
| Disport | amuse |
| Disputatious | fond of arguing |
| Disquisition | elaborate treatise |
| Dissimulate | to disguise |
| Dissipate | scatter |
| Dissolute | profligate, immoral |
| Dissonance | Discord |
| Dissuasion | advise against |
| Distaff | the female branch of a family |
| Distend | swell, inflate, bloat |
| Distrait | preoccupied, absent-minded |
| Distraught | distressed, very worried |
| Divergent | Tending in different directions |
| Divination | the forecast of future events or discovery of what is lost or hidden |
| Docile | domesticated, trained, tame |
| Docket | a list of cases to be dealt with |
| Doddering | shaky, infirm from old age |
| Doff | take off |
| Doggerel | poor verse |
| Dolorous | gloomy |
| Dolt | a stupid person |
| Domineer | to rule over something in a tyrannical way |
| Dorsal | belonging to the back side, posterior, tail |
| Dotage | senility, mental decline |
| Doughty | brave, dauntless |
| Dour | sullen and gloomy, stern and severe |
| Douse | to plunge into water, to extinguish |
| Dowdy | slovenly, untidy |
| Dregs | residue, riffraff |
| Droll | amusing in a wry |
| Drone | speak in a monotonic voice |
| Dross | waste matter, worthless impurities |
| Drudgery | Hard and constant work in any dull occupation |
| Duenna | governess |
| Dulcet | melodious, pleasant sounding |
| Duplicity | deceit, treachery, dishonesty, double-dealing |
| Durance | confinement |
| Duress | coercion, imprisonment |
| Dwindle | to diminish or become less |
| Dyspeptic | suffering from indigestion, gloomy and irritable |