~Decision~, _n._ ~1.~ Conclusion, judgment, determination, settlement.
~Deck~, _v. a._ Adorn, embellish, decorate, ornament, array, beautify.
~Declaim~, _v. n._ ~1.~ Harangue, spout, speak (_rhetorically_).
~Declamation~, _n._ ~1.~ Declaiming, haranguing, spouting.
~Declamatory~, _a._ ~1.~ In the style of declamation.
~2.~ Rhetorical, grandiloquent, inflated, bombastic, swelling, pompous, turgid, pretentious, high-flowing, high-sounding, HIGHFALUTIN.
~Declaration~, _n._ Affirmation, assertion, asseveration, averment, protestation, avowal.
~Declarative~, _a._ Explanatory, DECLARATORY.
~Declaratory~, _a._ ~1.~ Expressive, affirmative, enunciative, enunciatory.
~Declare~, _v. a._ Affirm, assert, aver, asseverate, state, proclaim, publish, promulgate, communicate, announce, utter, make known.
~Declare~, _v. n._ ~1.~ Make a declaration.
~Declension~, _n._ ~1.~ Decline, deterioration, degeneracy, decay, diminution, falling off.
~2.~ Decay, sink, droop, languish, pine, fail, become feeble.
~3.~ Deteriorate, degenerate, be impaired.
~4.~ Decrease, lessen, diminish, wane, fall away.
~Decline~, _n._ ~1.~ Decline, deterioration, degeneracy, decay, diminution, falling off.
~2.~ Consumption, phthisis, marasmus, atrophy, gradual wasting, progressive emaciation.
~Declivity~, _n._ Slope (_downwards_), descent.
~Decollation~, _n._ Beheading, decapitation.
~Decompose~, _v. a._ Decompound, analyze, resolve into its elements.
~Decomposition~, _n._ Analysis, resolution.
~Decompound~, _v. a._ Analyze, decompose.
~Decorate~, _v. a._ Adorn, deck, ornament, embellish, beautify.
~Decoration~, _n._ Ornament, embellishment.
~Decorous~, _a._ Decent, becoming, suitable, proper, befitting, seemly, comely, fit, decent.
~Decorum~, _n._ Decency, propriety, seemliness, appropriate behavior.
~Decoy~, _v. a._ Allure, lure, entice, inveigle, seduce, tempt, entrap, ensnare.
~Decrease~, _v. n._ Diminish (_gradually_), lessen, grow less.
~Decrease~, _v. a._ Diminish, lessen, make less.
~Decrease~, _n._ Diminution, lessening, decrement, reduction.
~Decree~, _v. n_. Ordain, appoint, determine.
~Decree~, _v. a._ Order, ordain, appoint, enjoin, command.
~Decree~, _n._ Edict, enactment, regulation, law, order, mandate, fiat, ordinance, statute.