use '?' for JOKER (blank)

From letters P, O, S, T, S, T, I, M, U, L, A, T, O, R, Y  I made following words

15 letter words

poststimulatory[22]

11 letter words

stimulatory[16], stipulatory[16], statutorily[14], stimulators[13], stipulators[13], postulators[13]

10 letter words

multiparty[17], osmolarity[15], timorously[15], multistory[15], puttyroots[15], prostomial[14], prostatism[14], lipomatous[14], pastoriums[14], multisport[14], tortiously[13], tortuosity[13], spoliators[12], simulators[12], autopilots[12], mutilators[12], stimulator[12], stipulator[12], postulator[12]

9 letter words

playrooms[16], palmistry[16], ptyalisms[16], plumosity[16], royalisms[14], mortality[14], otoplasty[14], pyrostats[14], amorously[14], polyurias[14], pulsatory[14], playsuits[14], puttyroot[14], prostomia[13], atropisms[13], pastromis[13], impostors[13], pastorium[13], pulmotors[13], potassium[13], plastrums[13], multipart[13], multiport[13], royalists[12], riotously[12], autolysis[12], statutory[12], spoliator[11], troopials[11], moralists[11], posttrial[11], totalisms[11], motorists[11], stolports[11], solariums[11], simulator[11], alumroots[11], troupials[11], uprootals[11], altruisms[11], muralists[11], ultraisms[11], pulsators[11], autopilot[11], mutilator[11], stomatous[11], autopsist[11], outsmarts[11], mistutors[11], outstrips[11], posturist[11], isolators[9], totalists[9], tutorials[9], altruists[9], ultraists[9], touristas[9], outstarts[9]

8 letter words

playroom[15], polyomas[15], misplays[15], symposia[15], ptyalism[15], royalism[13], isospory[13], molarity[13], morality[13], polarity[13], ramosity[13], stormily[13], morosity[13], prosomal[12], prosaism[12], prosomas[12], atropism[12], pastromi[12], marplots[12], taprooms[12], impostor[12], palmists[12], psalmist[12], impastos[12], misparts[12], tropisms[12], topmasts[12], primulas[12], imporous[12], pulmotor[12], plastrum[12], protiums[12], utopisms[12], royalist[11], solitary[11], oralisms[10], solarism[10], troopial[10], moralist[10], postoral[10], apostils[10], topsails[10], poloists[10], topsoils[10], mistrals[10], amorists[10], airposts[10], prosaist[10], protasis[10], totalism[10], talipots[10], tritomas[10], motorist[10], patriots[10], taproots[10], postriot[10], stolport[10], atomists[10], pastitso[10], misstart[10], protists[10], solarium[10], simulars[10], spirulas[10], saporous[10], alumroot[10], troupial[10], uprootal[10], solatium[10], altruism[10], muralist[10], ultraism[10], turmoils[10], timorous[10], stipular[10], postural[10], pulsator[10], astomous[10], slipouts[10], tourisms[10], upstairs[10], mulattos[10], outplots[10], striatum[10], outsmart[10], mistutor[10], outstrip[10], outports[10], utopists[10], outposts[10], stratums[10], mistrust[10], startups[10], upstarts[10], isolator[8], ostiolar[8], oralists[8], altoists[8], risottos[8], totalist[8], outsails[8], tissular[8], sautoirs[8], outsoars[8], tutorial[8], altruist[8], titulars[8], ultraist[8], tourista[8], tortious[8], outlasts[8], turistas[8], stratous[8], tourists[8], outstart[8], outtrots[8]