use '?' for JOKER (blank)

From letters P, H, O, T, O, G, E, O, L, O, G, I, S, T, S  I made following words

15 letter words

photogeologists[22]

14 letter words

photogeologist[21]

11 letter words

ethologists[15], topologists[14], osteologist[12]

10 letter words

spotlights[16], stoplights[16], ethologist[14], ghostliest[14], posologies[13], topologies[13], topologist[13], geologists[12], otologists[11]

9 letter words

spotlight[15], stoplight[15], helistops[14], isopleths[14], isophotes[14], postholes[14], photosets[14], slightest[13], ghostiest[13], toothless[12], geologist[11], stepstool[11], otologies[10], oologists[10], otologist[10], glottises[10]

8 letter words

pishoges[14], polishes[13], hoopless[13], helistop[13], hoplites[13], isopleth[13], isophote[13], posthole[13], potholes[13], pithless[13], photoset[13], hotspots[13], potshots[13], goloshes[12], theologs[12], sleights[12], lightest[12], gothites[12], goopiest[11], hostiles[11], hootiest[11], otoliths[11], thistles[11], soothest[11], googlies[10], loggiest[10], loopiest[10], soggiest[10], pistoles[10], isotopes[10], poloists[10], topsoils[10], plotties[10], politest[10], spittles[10], oologies[9], oologist[9], goosiest[9], ologists[9], egotists[9], ostioles[8], stoolies[8], sootiest[8], tootsies[8]

7 letter words

pishoge[13], plights[13], photogs[13], higgles[12], loggish[12], hoopoes[12], hoopoos[12], hipless[12], sophies[12], hoplite[12], pothole[12], hoggets[12], ophites[12], lithops[12], spilths[12], poshest[12], sophist[12], pettish[12], hotspot[12], potshot[12], goloshe[11], sleighs[11], theolog[11], sleight[11], hogties[11], slights[11], gothite[11], ghettos[11], epilogs[10], isohels[10], gospels[10], eoliths[10], holiest[10], hostile[10], ooliths[10], piglets[10], hitless[10], hostels[10], holists[10], soothes[10], spigots[10], otolith[10], lithest[10], thistle[10], hotties[10], theists[10], shtetls[10], sottish[10], gigolos[9], googols[9], posoles[9], giglets[9], goglets[9], loggets[9], toggles[9], giglots[9], piolets[9], pistole[9], isotope[9], poloist[9], topsoil[9], stipels[9], tipless[9], posties[9], potsies[9], sopites[9], topless[9], pistols[9], spittle[9], potties[9], tiptoes[9], pottles[9], spotlit[9], tosspot[9], ologies[8], isologs[8], logiest[8], gooiest[8], ologist[8], legists[8], egoists[8], stogies[8], stooges[8], egotist[8], glottis[8], oolites[7], ostiole[7], stoolie[7], loosest[7], lotoses[7], soloist[7], litotes[7], toilets[7], tootsie[7], tootles[7], tootses[7]

6 letter words

higgle[11], hoopoe[11], hoopoo[11], polish[11], sleigh[10], golosh[10], shogis[10], hoolie[9], epilog[9], helios[9], holies[9], isohel[9], pogies[9], gospel[9], shiels[9], hoises[9], hosels[9], sheols[9], loggie[8], gigolo[8], googol[8], pilose[8], poleis[8], polies[8], posole[8], polios[8], igloos[7], isolog[7], siglos[7], looies[6]