use '?' for JOKER (blank)

From letters D, I, S, T, R, I, B, U, T, I, O, N, S  I made following words

13 letter words

distributions[16]

12 letter words

distribution[15]

10 letter words

routinists[10]

9 letter words

insidious[10], routinist[9], ouistitis[9]

8 letter words

sunbirds[11], bundists[11], dustbins[11], disturbs[11], bistorts[10], boursins[10], bursitis[10], inbursts[10], sistroid[9], distorts[9], sinusoid[9], distrust[9], ironists[8], introits[8], ouistiti[8], tuitions[8], intrusts[8], tourists[8]

7 letter words

tidbits[10], boudins[10], sunbird[10], bundist[10], dustbin[10], outbids[10], obtunds[10], disturb[10], biotins[9], bistros[9], bistort[9], boursin[9], suborns[9], inburst[9], burtons[9], buttons[9], turbits[9], turbots[9], tubists[9], sordini[8], dinitro[8], nitrids[8], distort[8], diurons[8], durions[8], nudists[8], studios[8], stounds[8], strouds[8], ironist[7], introit[7], intorts[7], tritons[7], stotins[7], nitrous[7], turions[7], outsins[7], suitors[7], tsouris[7], tuition[7], intuits[7], intrust[7], tourist[7], outsits[7], strunts[7]

6 letter words

bindis[9], tidbit[9], boudin[9], bounds[9], outbid[9], obtund[9], turbid[9], bundts[9], doubts[9], oribis[8], robins[8], bisons[8], biotin[8], binits[8], bionts[8], bistro[8], orbits[8], britts[8], bruins[8], burins[8], bourns[8], suborn[8], bosuns[8], burton[8], subito[8], bruits[8], brunts[8], robust[8], turbos[8], bursts[8], button[8], turbit[8], turbot[8], tubist[8], iodins[7], indris[7], nitrid[7], idiots[7], droits[7], odists[7], dittos[7], diuron[7], durion[7], rounds[7], sounds[7], ursids[7], sudors[7], rotund[7], untrod[7], nudist[7], studio[7], donuts[7], stound[7], stroud[7], rosins[6], iritis[6], intros[6], nitros[6], insist[6], tsoris[6], snorts[6], intort[6], triton[6], otitis[6], stotin[6], stints[6], turion[6], outsin[6], rutins[6], suitor[6], suints[6], snouts[6], tsuris[6], rousts[6], stours[6], tussor[6], intuit[6], outsit[6], strunt[6], trouts[6], tutors[6], stunts[6], stouts[6], struts[6], sturts[6], trusts[6]

5 letter words

bindi[8], bidis[8], binds[8], bonds[8], birds[8], dribs[8], oribi[7], robin[7], bison[7], brins[7], biros[7], brios[7], snibs[7], snobs[7], briss[7], sorbs[7], binit[7], biont[7], orbit[7], bints[7], obits[7], iodin[6], indri[6], dinos[6], irids[6], rinds[6], dross[6], sords[6], nitid[6], idiot[6], tondi[6], droit[6], dints[6], doits[6], odist[6], irons[5], noirs[5], noris[5], ornis[5], rosin[5], sorns[5], torii[5], intro[5], nitro[5], intis[5]