use '?' for JOKER (blank)

From letters E, D, U, C, A, T, O, R  I made following words

8 letter words

aeroduct[11], educator[11], outraced[11]

7 letter words

cordate[10], redcoat[10], curated[10], traduce[10], courted[10], eductor[10], outrace[9], outdare[8], outread[8], readout[8]

6 letter words

coated[9], carted[9], crated[9], redact[9], traced[9], truced[9], coater[8], recoat[8], coteau[8], acuter[8], curate[8], cuatro[8], turaco[8], couter[8], croute[8], orated[7], autoed[7], detour[7], redout[7], routed[7], toured[7]

5 letter words

acred[8], arced[8], cadre[8], cared[8], cedar[8], raced[8], coder[8], cored[8], credo[8], decor[8], acted[8], cadet[8], octad[8], coted[8], coude[8], douce[8], crude[8], cured[8], duroc[8], ducat[8], educt[8], ocrea[7], caret[7], carte[7], cater[7], crate[7], react[7], recta[7], trace[7], actor[7], taroc[7], recto[7], acute[7], cruet[7], curet[7], cuter[7], eruct[7], recut[7], truce[7], court[7], adore[6], oared[6], oread[6], dater[6], derat[6], rated[6], tared[6], trade[6], tread[6], tardo[6], doter[6], trode[6], doura[6], uredo[6], outed[6], trued[6], oater[5], orate[5], urate[5], outer[5], outre[5], route[5]

4 letter words

aced[7], cade[7], dace[7], coda[7], code[7], coed[7], deco[7], card[7], cred[7], cord[7], cued[7], duce[7], crud[7], curd[7], duct[7], acre[6], care[6], race[6], arco[6], orca[6], cero[6], core[6], cate[6], tace[6], coat[6], taco[6], cote[6], cart[6], torc[6], cure[6], ecru[6], cute[6], curt[6], odea[5], dare[5], dear[5], read[5], orad[5], road[5], doer[5], dore[5], redo[5], rode[5], date[5], dato[5], doat[5], toad[5], dote[5], toed[5], dart[5], drat[5], trad[5], trod[5], dura[5], dure[5], rude[5], rued[5], dour[5], duro[5], daut[5], duet[5], turd[5], aero[4], toea[4], rate[4], tare[4], tear[4], rato[4], rota[4], taro[4], tora[4], rote[4], tore[4], urea[4], euro[4], roue[4], auto[4], true[4], rout[4], tour[4]

3 letter words

cad[6], cod[6], doc[6], ace[5], oca[5], arc[5], car[5], rec[5], cor[5], orc[5], roc[5], ado[4], oda[4], doe[4], ode[4], rad[4], red[4], dor[4], rod[4], are[3], ear[3], era[3], oar[3], ora[3]