use '?' for JOKER (blank)

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

15 letter words

parasitologists[18]

14 letter words

parasitologist[17]

12 letter words

pastoralists[14]

11 letter words

plagiarists[14], parasitosis[13], pastoralist[13]

10 letter words

plagiarist[13], apologists[13], sprigtails[13], prologists[13], grassplots[13], proglottis[13], spoliators[12], spritsails[12], pastitsios[12], glossarist[11], glossators[11], litigators[11]

9 letter words

apologias[12], apologist[12], sprigtail[12], prologist[12], goalposts[12], grassplot[12], psoriasis[11], pastorali[11], spoliator[11], troopials[11], apiarists[11], spritsail[11], pastorals[11], spiritoso[11], solipsist[11], prosaists[11], parotitis[11], posttrial[11], pastitsio[11], stolports[11], pastitsos[11], glossator[10], glossitis[10], litigator[10], agitators[10], gastritis[10], isolators[9], satirists[9], sitarists[9]

8 letter words

apologia[11], sapsagos[11], pigtails[11], galipots[11], goalpost[11], gosports[11], parasols[10], psilosis[10], pissoirs[10], troopial[10], tilapias[10], apiarist[10], partials[10], pastoral[10], tripolis[10], postoral[10], apostils[10], topsails[10], poloists[10], topsoils[10], airposts[10], prosaist[10], protasis[10], talipots[10], partitas[10], patriots[10], taproots[10], postriot[10], stolport[10], pastitso[10], protists[10], tosspots[10], girasols[9], girosols[9], isogloss[9], sargasso[9], otalgias[9], ologists[9], strigils[9], orgiasts[9], attagirl[9], agitator[9], sagittal[9], isolator[8], ostiolar[8], alastors[8], oralists[8], soloists[8], assistor[8], rattails[8], altoists[8], satirist[8], sitarist[8], risottos[8], tsarists[8]

7 letter words

apologs[10], prologs[10], sapsago[10], gaposis[10], gossips[10], pigtail[10], galipot[10], ragtops[10], gosport[10], spigots[10], aporias[9], parasol[9], saloops[9], spirals[9], pissoir[9], tilapia[9], partial[9], tripoli[9], spatial[9], tapalos[9], apostil[9], topsail[9], poloist[9], topsoil[9], airpost[9], patrols[9], portals[9], pastils[9], spitals[9], pistils[9], sapotas[9], postals[9], pistols[9], satraps[9], rapists[9], spirits[9], pastors[9], riposts[9], talipot[9], partita[9], patriot[9], taproot[9], spotlit[9], protist[9], tosspot[9], laogais[8], argalis[8], girasol[8], glorias[8], goorals[8], girosol[8], isologs[8], glossas[8], otalgia[8], galiots[8], latigos[8], galoots[8], ologist[8], gastral[8], strigil[8], orgiast[8], stalags[8], agitato[8], glottis[8], grottos[8], solaria[7], ooralis[7], sailors[7], ariosos[7], assails[7], assoils[7], sorosis[7], solatia[7], lariats[7], latrias[7], alastor[7], oralist[7], rialtos[7], tailors[7], soloist[7], aristas[7], tarsias[7], astrals[7], tarsals[7], aorists[7], aristos[7], satoris[7], tsooris[7], ostosis[7], assorts[7], rattail[7], altoist[7], striata[7], stratal[7], starlit[7], risotto[7], tatsois[7], stratas[7]