use '?' for JOKER (blank)

From letters A, N, D, R, O, S, T, E, R, O, N, E, S  I made following words

13 letter words

androsterones[14]

12 letter words

androsterone[13]

10 letter words

nonreaders[11], rootedness[11], reassorted[11], ornateness[10], resonators[10]

9 letter words

nonreader[10], endorsers[10], endorsors[10], resonated[10], nondesert[10], tornadoes[10], toreadors[10], sandstone[10], notedness[10], stranders[10], roadsters[10], ensnarers[9], reasoners[9], rotenones[9], ratooners[9], resonator[9], earstones[9], resonates[9], resonants[9], oestrones[9], sonorants[9], sororates[9]

8 letter words

ensnared[9], reasoned[9], adorners[9], readorns[9], endorser[9], endorsor[9], adenoses[9], seasoned[9], doneness[9], dearness[9], endorses[9], droseras[9], nonrated[9], ratooned[9], enrooted[9], toreador[9], endostea[9], endnotes[9], sonneted[9], odonates[9], donators[9], odorants[9], tandoors[9], tornados[9], arrested[9], retreads[9], serrated[9], treaders[9], strander[9], roadster[9], resorted[9], restored[9], redroots[9], assented[9], sensated[9], standees[9], stenosed[9], asserted[9], standers[9], assorted[9], torsades[9], dosseret[9], oersteds[9], ensnarer[8], reasoner[8], ensnares[8], nearness[8], rennases[8], reseason[8], seasoner[8], rareness[8], serranos[8], rotenone[8], ratooner[8], neonates[8], earstone[8], resonate[8], resonant[8], enterons[8], tenoners[8], oestrone[8], sonorant[8], terranes[8], antrorse[8], sororate[8], neatness[8], assenter[8], earnests[8], sarsenet[8], assentor[8], santeros[8], senators[8], starnose[8], treasons[8], estrones[8], sternson[8], santoors[8], asserter[8], reassert[8], serrates[8], terrases[8], assertor[8], assorter[8], oratress[8], reassort[8], roasters[8], restores[8], snorters[8], roosters[8]

7 letter words

adorner[8], readorn[8], enneads[8], donnees[8], endears[8], endorse[8], roadeos[8], readers[8], redears[8], rereads[8], darners[8], errands[8], renders[8], adorers[8], drosera[8], reredos[8], droners[8], resedas[8], sanders[8], redness[8], resends[8], senders[8], sarodes[8], sonders[8], dresser[8], redress[8], dorsers[8], sordors[8], endnote[8], tenoned[8], odonate[8], erodent[8], donnert[8], donator[8], odorant[8], tandoor[8], tornado[8], retread[8], treader[8], redroot[8], standee[8], donates[8], denotes[8], tendons[8], snooted[8], dearest[8], derates[8], redates[8], sedater[8], stander[8], tenders[8], roasted[8], ensnare[7], rennase[7], arenose[7], earners[7], reearns[7], serrano[7], oneness[7], serosae[7], reasons[7], senoras[7], senores[7], noosers[7], sooners[7], erasers[7], snarers[7], soarers[7], snorers[7], sorners[7], roosers[7], neonate[7], enteron[7], tenoner[7], terrane[7], neatens[7], earnest[7], eastern[7], nearest[7], tanners[7], rennets[7], tenners[7]