use '?' for JOKER (blank)

From letters X, E, R, O, R, A, D, I, O, G, R, A, P, H, Y  I made following words

15 letter words

xeroradiography[32]

11 letter words

radiography[21]

10 letter words

xerography[26], ideography[20], radiograph[17]

9 letter words

hyperarid[18], orography[18], pyorrhoea[17], ideograph[16], diarrhoea[13]

8 letter words

hexapody[24], pyorrhea[16], diagraph[15], odograph[15], hoorayed[15], paygrade[15], porridgy[15], hagrider[13], diarrhea[12], parridge[12], dragrope[12], prograde[12], porridge[12], horrider[12], preradio[11], progeria[11], droopier[11], gerardia[10]

7 letter words

hypoxia[22], hexapod[20], pyrexia[19], paradox[17], peroxid[17], hypogea[16], exordia[15], orphrey[15], graphed[14], digraph[14], hayride[14], hydriae[14], prodigy[14], raphide[13], drapery[13], grapery[13], hagride[12], hagrode[12], drayage[12], yardage[12], airhead[11], hoodier[11], podagra[11], podgier[11], hardier[11], harried[11], hoarder[11], rhodora[11], arrayed[11], parodoi[10], goopier[10], hoarier[10], parader[10], parerga[10], parried[10], rapider[10], grapier[10], parador[10], eardrop[10], airdrop[10], harrier[10], arrayer[10], grodier[9], pareira[9], parrier[9]

6 letter words

expiry[18], peroxy[18], hoaxed[17], hoaxer[16], poxier[15], hypoed[15], exodoi[14], phooey[14], hydrae[13], hydria[13], gharry[13], hooped[12], poohed[12], pardah[12], harped[12], gopher[12], hooray[12], drapey[12], prayed[12], grapey[12], gripey[12], parody[12], droopy[12], horary[12], predry[12], dreigh[11], driegh[11], raphae[11], pariah[11], raphia[11], ephori[11], hooper[11], harper[11], gaydar[11], grayed[11], apiary[11], piraya[11], prayer[11], ropery[11], priory[11], hoagie[10], hoodie[10], pagoda[10], haired[10], hegari[10], hegira[10], gherao[10], hairdo[10], dhoora[10], parged[10], griped[10], groped[10], harder[10], aarrgh[10], gharri[10], horrid[10], dreary[10], yarder[10], grayer[10], yirred[10], parade[9], diaper[9], paired[9], pardie[9], repaid[9], dopier[9], period[9], draper[9], parred[9], griper[9], dorper[9], groper[9], horror[9], ariary[9], arroyo[9], orrery[9], adagio[8], goodie[8], gardai[8], dogear[8], aporia[8], garred[8], grader[8], regard[8], girder[8], rapier[8], repair[8], ropier[8], poorer[8], agorae[7], roadie[7], roadeo[7], oroide[7], gooier[7], arider[7], raider[7], adorer[7], roared[7], gorier[7], arrear[6], roarer[6]

5 letter words

phage[11], aphid[11], ephod[11], hoped[11], aahed[9], ahead[9], oohed[9], gaped[9], paged[9], pagod[9], hared[9], heard[9], aargh[9], gerah[9], agape[8], podia[8], pooed[8], adage[7], dogie[7], geoid[7], garda[7], grade[7], raged[7], aider[6], aired[6], deair[6]