use '?' for JOKER (blank)

From letters F, R, A, T, E, R, N, I, Z, A, T, I, O, N, S  I made following words

15 letter words

fraternizations[26]

14 letter words

fraternization[25]

11 letter words

infestation[14], sinfonietta[14], transfinite[14], interstrain[11]

10 letter words

fantasizer[21], tanzanites[18], infantries[13], rotiferans[13], senatorian[10], narrations[10], sanitation[10], itinerants[10], iterations[10], tarnations[10], stentorian[10], nitrations[10], transition[10], tretinoins[10], tristearin[10], nonstarter[10]

9 letter words

fantasize[20], atrazines[17], sanitizer[17], triazines[17], notarizes[17], satirizer[17], tanzanite[17], zaratites[17], safranine[12], franseria[12], inferiors[12], rotiferan[12], faineants[12], introfies[12], notifiers[12], frontenis[12], ratifiers[12], ferritins[12], torrifies[12], frontiers[12], infestant[12], fetations[12], retrofits[12], narration[9], antinoise[9], antiarins[9], aerations[9], sanitoria[9], seriation[9], anointers[9], reanoints[9], insertion[9], serration[9], interiors[9], itinerant[9], iteration[9], tarnation[9], nitration[9], tretinoin[9], insatiate[9], satiation[9], annotates[9], natations[9], intonates[9], attainers[9], reattains[9], tearstain[9], instanter[9], intranets[9], transient[9], internist[9], restation[9], stationer[9], striation[9], nonartist[9], strontian[9], arteritis[9], irritates[9], arrestant[9], restraint[9], retirants[9], irritants[9], nitrators[9]

8 letter words

inferior[11], sainfoin[11], sinfonia[11], sinfonie[11], safranin[11], farinose[11], infernos[11], airfares[11], friaries[11], rarifies[11], refrains[11], faineant[11], notifier[11], ratifier[11], ferritin[11], triforia[11], frontier[11], fantasie[11], infantas[11], infantes[11], finniest[11], notifies[11], fontinas[11], ratifies[11], fainters[11], ferninst[11], seafront[11], firriest[11], transfer[11], frostier[11], rotifers[11], refronts[11], fetation[11], retrofit[11], faintest[11], niftiest[11], fistnote[11], sirenian[8], raisonne[8], insnarer[8], rosarian[8], antiarin[8], triennia[8], aeration[8], anointer[8], reanoint[8], inerrant[8], anterior[8], interior[8], sonatina[8], enations[8], sonatine[8], antisera[8], ratanies[8], santeria[8], seatrain[8], intarsia[8], inertias[8], rainiest[8], entrains[8], trannies[8], notaries[8], senorita[8], resonant[8], intoners[8], ternions[8], rarities[8], narrates[8], restrain[8], retrains[8], strainer[8], terrains[8], trainers[8], aerators[8], rotaries[8], sartorii[8], antrorse[8], introrse[8], annotate[8], natation[8], intonate[8], attainer[8], reattain[8], intranet[8], tentoria[8], antiriot[8], irritate[8], retirant[8], irritant[8], nitrator[8], astatine[8], sanitate[8], titanias[8], tannates[8], stannite[8], tinniest[8], ostinati[8], annattos[8], tinstone[8], tontines[8], ariettas[8], aristate[8], intreats[8], nitrates[8], straiten[8], tertians[8], nitrites[8], entrants[8], intrants[8], aerostat[8], toastier[8], arnattos[8], strontia[8], snottier[8], tenorist[8]