use '?' for JOKER (blank)

From letters K, E, R, A, T, O, P, L, A, S, T, I, E, S  I made following words

14 letter words

keratoplasties[20]

11 letter words

pastoralist[13]

10 letter words

sparkliest[16], poststrike[16], karateists[14], streakiest[14], periosteal[12], psalteries[12], pastorales[12], saprolites[12], epistolers[12], pistoleers[12], apostatise[12], separatist[12], striptease[12], tapestries[12], saltpeters[12], saltpetres[12], pastorates[12], poetasters[12], aliterates[10], retaliates[10]

9 letter words

spearlike[15], pastalike[15], parakeets[15], parakites[15], lapstrake[15], lapstreak[15], lakeports[15], spikelets[15], sparkiest[15], sparklets[15], parkettes[15], lorikeets[13], triskeles[13], keratoses[13], keratosis[13], karateist[13], stalkiest[13], espaliers[11], psoraleas[11], polarises[11], leprosies[11], apetalies[11], palestrae[11], parietals[11], psalteria[11], pearliest[11], pearlites[11], periostea[11], pastorale[11], pastorali[11], epilators[11], saprolite[11], epistoler[11], pistoleer[11], stapelias[11], spoliates[11], politesse[11], asperates[11], separates[11], aspirates[11], parasites[11], satrapies[11], palestras[11], pilasters[11], plaisters[11], psaltries[11], epistlers[11], proteases[11], poetisers[11], pastorals[11], polestars[11], petiolate[11], toeplates[11], patriates[11], saltpeter[11], saltpetre[11], paltriest[11], pastorate[11], operettas[11], poetaster[11], potteries[11], teleports[11], posttrial[11], portliest[11], pastelist[11], apostates[11], pretastes[11], stairstep[11], splatters[11], sprattles[11], splitters[11], prostates[11], sportiest[11], aerolites[9], oleasters[9], aliterate[9], retaliate[9], etiolates[9], laterites[9], literates[9], statelier[9], tolerates[9], lotteries[9], totalises[9], stearates[9], sestertia[9], treatises[9], aerostats[9]

8 letter words

ropelike[14], soaplike[14], asparkle[14], palikars[14], sparlike[14], peakless[14], respeaks[14], speakers[14], sparkles[14], presoaks[14], tapelike[14], poetlike[14], parakeet[14], parakite[14], traplike[14], lakeport[14], peakiest[14], spikelet[14], steplike[14], partakes[14], perkiest[14], sparklet[14], porkiest[14], roselike[12], lorikeet[12], leakiest[12], keitloas[12], larkiest[12], stalkier[12], starlike[12], triskele[12], keratose[12], espalier[10], psoralea[10], parolees[10], pelorias[10], polarise[10], spiraeas[10], pleasers[10], presales[10], relapses[10], spielers[10], parasols[10], reposals[10], spoilers[10], parietal[10], pearlite[10], epilator[10], petiolar[10], stapelia[10], epilates[10], spoliate[10], petioles[10], asperate[10], separate[10], aspirate[10], parasite[10], septaria[10], parietes[10], palestra[10], petrales[10], pleaters[10], prelates[10], replates[10], partials[10], pilaster[10], plaister[10], plaiters[10], epistler[10], peltries[10], perlites[10], reptiles[10], operates[10], protease[10], poetiser[10], poetries[10], pastoral[10], petrosal[10], assailer[8], reassail[8], salaries[8], realises[8], solarise[8], areolate[8], aerolite[8], ateliers[8], earliest[8], leariest[8], realties[8], oleaster[8]