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From letters L, Y, S, O, G, E, N, I, Z, A, T, I, O, N, S  I made following words

15 letter words

lysogenizations[27]

14 letter words

lysogenization[26]

11 letter words

gleizations[20], elongations[12], isoantigens[12], langostinos[12], insolations[11]

10 letter words

zygosities[22], signalizes[19], sloganizes[19], gleization[19], sinologies[11], toenailing[11], elongation[11], antilogies[11], isoantigen[11], insolating[11], langostino[11], ingestions[11], singletons[11], sitologies[11], enologists[11], neologists[11], sinologist[11], lineations[10], insolation[10], lanosities[10], isolations[10]

9 letter words

stylizing[21], signalize[18], sloganize[18], ozonising[18], snoozling[18], glaziness[18], ozonating[18], azotising[18], salinizes[17], latinizes[17], entozoans[17], zonations[17], sanitizes[17], snooziest[17], yeanlings[13], langsynes[13], nonglossy[13], geniality[13], atoningly[13], aetiology[13], teasingly[13], astonying[13], stylising[13], asininely[12], lyonnaise[12], syntonies[12], nonstyles[12], lesioning[10], loosening[10], signalise[10], gasolines[10], assoiling[10], seasoning[10], lessoning[10], isogonies[10], isogonals[10], entailing[10], entoiling[10], gainliest[10], gantlines[10], enlisting[10], listening[10], tinseling[10], gelations[10], legations[10], intaglios[10], isolating[10], ligations[10], negations[10], ingestion[10], singleton[10], enologist[10], neologist[10], slangiest[10], stealings[10], tasseling[10], assenting[10], sensating[10], tanginess[10], nestlings[10], agonistes[10], solanines[9], looniness[9], lineation[9], antinoise[9], tensional[9], lenitions[9], isolation[9], alienists[9], insolates[9], sensation[9], insolents[9], solations[9], oilstones[9], inositols[9]

8 letter words

aliening[9], eloining[9], eanlings[9], leanings[9], snailing[9], enisling[9], ensiling[9], gasoline[9], anginose[9], loanings[9], isogonal[9], ionogens[9], glonoins[9], snooling[9], gainless[9], glassine[9], leasings[9], sailings[9], linsangs[9], soilages[9], agonises[9], glossina[9], lassoing[9], loginess[9], longness[9], isogones[9], gantline[9], latening[9], leniting[9], gelation[9], legation[9], intaglio[9], ligation[9], negation[9], gelatins[9], genitals[9], stealing[9], taglines[9], tailings[9], lignites[9], lingiest[9], antigens[9], gentians[9], sainting[9], staining[9], ginniest[9], slanting[9], nestling[9], latigoes[9], otalgies[9], tangelos[9], antilogs[9], solating[9], negatons[9], tonnages[9], gooniest[9], stooling[9], toolings[9], snooting[9], eastings[9], giantess[9], seatings[9], lastings[9], anilines[8], solanine[8], anisoles[8], liaisons[8], elisions[8], isolines[8], lionises[8], oiliness[8], inosines[8], solanins[8], lenition[8], notional[8], alienist[8], litanies[8], elations[8], insolate[8], toenails[8], enations[8], sonatine[8], antlions[8], insolent[8], nitinols[8], solation[8], looniest[8], oilstone[8], inositol[8], isatines[8], sanities[8], sanitise[8], teniasis[8], elastins[8], nailsets[8], salients[8], saltines[8]