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

14 letter words

allegorization[23]

12 letter words

legalization[21], lateralizing[21]

11 letter words

rationalize[19], realization[19]

10 letter words

gleization[19], laterizing[19], allegation[11], lateraling[11], relational[10]

9 letter words

analogize[18], gazillion[18], realizing[18], erotizing[18], alizarine[17], genitalia[10], allegiant[10], argillite[10], antiglare[10], lariating[10], retailing[10], tillering[10], alligator[10], aragonite[10], originate[10], tailoring[10], loitering[10], retooling[10], alienator[9], rationale[9]

8 letter words

zoogleal[17], organize[17], teazling[17], glitzier[17], alizarin[16], lionizer[16], latinize[16], entozoal[16], atrazine[16], triazine[16], triazole[16], notarize[16], zoolater[16], lagoonal[9], galleria[9], geranial[9], gainlier[9], allergin[9], geraniol[9], regional[9], original[9], ligroine[9], religion[9], reoiling[9], gloriole[9], agential[9], alginate[9], gelation[9], legation[9], intaglio[9], ligation[9], aerating[9], argental[9], alerting[9], altering[9], integral[9], relating[9], tanglier[9], triangle[9], ringtail[9], trailing[9], glintier[9], retiling[9], tinglier[9], trilling[9], rigatoni[9], trigonal[9], trolling[9], rogation[9], rootling[9], allanite[8], illation[8], atenolol[8], arillate[8], inertial[8], aeration[8], notarial[8], rational[8], oriental[8], relation[8], antiroll[8], trillion[8], tornillo[8]

7 letter words

gallein[8], nigella[8], logania[8], allonge[8], galleon[8], galloon[8], regalia[8], anergia[8], aligner[8], engrail[8], nargile[8], realign[8], reginal[8], lairing[8], railing[8], lingier[8], langrel[8], rilling[8], allegro[8], gorilla[8], girolle[8], granola[8], ligroin[8], roiling[8], rolling[8], oregano[8], goonier[8], gallate[8], galleta[8], tallage[8], tillage[8], ignatia[8], atingle[8], elating[8], gelatin[8], genital[8], tagline[8], intagli[8], tailing[8], lignite[8], gallant[8], gellant[8], gillnet[8], telling[8], lilting[8], tilling[8], otalgia[8], tollage[8], galliot[8], tangelo[8], antilog[8], lentigo[8], toiling[8], tolling[8], galloot[8], looting[8], tooling[8], tanager[8], granita[8], granite[8], gratine[8], ingrate[8], tangier[8], tearing[8], airting[8], igniter[8], tiering[8], tangler[8], ringlet[8], tingler[8], tirling[8], gloater[8], legator[8], negator[8], orating[8], genitor[8], ignitor[8], rioting[8], rootage[8], rooting[8], aeolian[7], airline[7], ralline[7], aileron[7], alienor[7], loonier[7], lanital[7], alation[7], elation[7], toenail[7], lateral[7], literal[7], tallier[7], antiair[7], inertia[7], latrine[7], ratline[7], reliant[7], retinal[7], trenail[7], lintier[7], nitrile[7], reallot[7], litoral[7], retinol[7], oration[7], ortolan[7]