diffuse, discursive, rambling, and wordy
diligence, attention, industry, and assiduity [assiduity = persistent application]
disagreement, discrepancy, difference, and divergence
disconsolate, desolate, pessimistic, and impossible
discrimination, acuteness, insight, and judgment
disgust, distaste, loathing, and abhorrence
dissatisfied, rebellious, unsettled, and satirical
distinct, definite, clear, and obvious
distinguished, glorious, illustrious, and eminent
disturbed, shaken, distressed, and bewildered