Here is a list of nouns that start with DI.

diagnometer, diagnosing, diagnostic, diagram, dial

dialect, dialectic, dialogue, diam, diameter

diamond, diaphragm, diarrhea, diarrhoea, diary

diathermy, dice, dichondra, dichotomy, dictator

dictatorship, diction, dictionary, dictum, die

diem, diesel, diet, diethylaminoethyl, diethylstilbestrol

diety, difference, differentiability, differential, differentiation

difficulty, diffidence, diffraction, diffrunce, diffusion

dig, digest, digit, digitalization, dignity

diisocyanate, dilatation, dilation, dilemma, dilettante

diligence, dill, dilution, dime, dimension

dimensioning, dimethylglyoxime, diminution, din, dinghy

dingo, dining, dinner, dinnertime, dinnerware

dinosaur, diocese, diorah, dioxalate, dioxide

dip, diphosphopyridine, diplomacy, diplomat, dipper

direction, directionality, directive, directivity, director

directorate, directorship, directory, dirge, dirt

disability, disadvantage, disaffection, disagreement, disappearance

disappointment, disapprobation, disapproval, disarmament, disarray

disassembly, disaster, disbelief, disbursement, disc

discernment, discharge, disciple, discipleship, discipline

disclaimer, disclosure, discomfort, discontent, discontinuance

discontinuity, discord, discount, discouragement, discourse

discoverer, discovery, discredit, discrepancy, discretion

discrimination, discussant, discussion, disdain, disease

disenfranchisement, disengagement, disfavor, disgrace, disguise

disgust, dish, disharmony, dishonesty, dishonor

dishwater, disillusionment, disinclination, disintegration, disinterest

disk, dislike, dislocation, disloyalty, dismay

dismemberment, dismissal, disobedience, disorder, disorganization

disparagement, disparity, dispatch, dispensary, dispensation

dispenser, dispersal, dispersement, dispersion, displacement

display, displeasure, disposal, disposition, dispossession

dispute, disquiet, disquietude, disregard, disrepair

disrepute, disrespect, disruption, dissatisfaction, dissection

dissemination, dissension, dissent, dissenter, disservice

dissimulation, dissociation, dissolution, dissolve, distance

distaste, distension, distillation, distiller, distinction

distortion, distraction, distribution, distributor, distributorship

district, distrust, disturbance, disturber, disunion

disunity, ditch, ditcher, ditty, diva

divan, dive, diver, divergence, diversification

diversion, diversity, divertimento, divestiture, dividend

divider, divination, divine, diving, divinity

division, divorce, divorcee

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