Diadem. Crown, chaplet, fillet, wreath, tiara, circlet.
Diagnosis. Investigation, determination, analysis.
Ant. Misjudgment, error.
Diagnostic. Symptom, feature, sign, cue, indication, mark, index.
Ant. Development, consummation, crisis, head, formation.
Dialect. Language, phraseology, tongue, speech, provincialism, idiom, accent.
Dialogue. Conversation between two people, colloquy, discourse, tête-à-tête.
Ant. Monologue, soliloquy, apostrophe, oration.
Dictate. Direct, ordain, command, prescribe, order, bid, require, decree; utter; prompt, suggest, enjoin, instruct.
Ant. Follow, repeat, obey, answer; accept.