use '?' for JOKER (blank)

From letters F, E, T, I, S, H, I, S, T, I, C, A, L, L, Y  I made following words

15 letter words

fetishistically[26]

12 letter words

theistically[20]

11 letter words

faithlessly[20], fetishistic[19]

10 letter words

ethicality[18], thetically[18], tachylites[18], stealthily[16], facilities[15], theistical[15], chastities[15], elasticity[15], tactlessly[15], italicises[12]

9 letter words

selfishly[18], catfishes[17], ethically[17], tachylite[17], cattishly[17], lithifies[15], helilifts[15], faithless[15], flashiest[15], fishtails[15], filthiest[15], fetishist[15], shiftiest[15], fissility[15], lethality[15], challises[14], chilliest[14], satisfice[14], fasciitis[14], fiscalist[14], chiliasts[14], atheistic[14], athletics[14], tachistes[14], ethicists[14], ciliately[14], tactilely[14], sectility[14], systaltic[14], stylistic[14], falsities[12], lithiases[12], lithiasis[12], tallithes[12], italicise[11], silicates[11], stilliest[9]

8 letter words

flysches[19], flashily[17], elfishly[17], fleshily[17], filthily[17], shiftily[17], flitches[16], fitchets[16], facilely[16], silicify[16], fiscally[16], classify[16], facility[16], felicity[16], helicity[16], chastely[16], chestily[16], lecythis[16], chattily[16], tetchily[16], chastity[16], sailfish[14], helilift[14], fishtail[14], tilefish[14], fishiest[14], flattish[14], hyalites[14], feistily[14], festally[14], stellify[14], stealthy[14], icefalls[13], challies[13], chillies[13], shellacs[13], citifies[13], ethicals[13], felsitic[13], chiliast[13], hellcats[13], chillest[13], chastise[13], fascitis[13], satchels[13], slatches[13], athletic[13], thetical[13], tachiste[13], chitties[13], ethicist[13], itchiest[13], theistic[13], chattels[13], latchets[13], chastest[13], tachists[13], stitches[13], classily[13], clayiest[13], stylitic[13], cystitis[13], salifies[11], fetialis[11], filiates[11], hilliest[11], sealifts[11], heliasts[11], shaliest[11], haltless[11], hiltless[11], lathiest[11], thelitis[11], flatlets[11], talliths[11], littlish[11], atheists[11], hastiest[11], staithes[11], stithies[11], stealths[11], leftists[11], thistles[11], shitlist[11], stylites[11], laicises[10], silicles[10], ciliates[10], silicate[10], elastics[10], scaliest[10], cellists[10], lattices[10], statices[10], tactless[10], tailless[8], tallises[8], silliest[8], tillites[8], saltiest[8], slatiest[8], elitists[8], siltiest[8], stillest[8]

7 letter words

fiaschi[15], filches[15], catfish[15], fitches[15], fellahs[13], flashes[13], hisself[13], selfish[13], icefall[12], challie[12], helical[12], fecials[12], ischial[12], chilies[12], shellac[12], challis[12], chillis[12], chaises[12], clashes[12], fiscals[12], chisels[12], ethical[12], fictile[12], hellcat[12], thallic[12], achiest[12], aitches[12], chalets[12], failles[10], fillies[10], falsies[10], sheilas[10], fissile[10], filiate[10], laicise[9], silicle[9], silicas[9], scillas[9], ciliate[9], illicit[9], illitic[9], liaises[7], silesia[7], sallies[7], sillies[7]