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

11 letter words

zillionaire[19]

8 letter words

lionizer[16]

7 letter words

lionize[15], zillion[15], zorilla[15], zorille[15], ionizer[15], ironize[15], airline[7], ralline[7], aileron[7], alienor[7]

6 letter words

ionize[14], lazier[14], zanier[14], lienal[6], lineal[6], nielli[6], eolian[6], niello[6], aliner[6], larine[6], linear[6], nailer[6], renail[6], inlier[6], linier[6], oilier[6], loreal[6], loaner[6], reloan[6], neroli[6], enroll[6]

5 letter words

azine[13], azole[13], zoeal[13], zonae[13], azlon[13], zonal[13], zaire[13], zoril[13], zoner[13], ileal[5], ilial[5], alien[5], aline[5], anile[5], elain[5], liane[5], aioli[5], alone[5], anole[5], aloin[5], eloin[5], olein[5], llano[5], ariel[5], iller[5], rille[5], learn[5], renal[5], liner[5], oiler[5], oriel[5], reoil[5], loral[5], noria[5], irone[5], loran[5], enrol[5], loner[5], nerol[5]

4 letter words

laze[12], zeal[12], zill[12], nazi[12], zein[12], zine[12], zoea[12], azon[12], zona[12], zone[12], raze[12], izar[12], zero[12], zori[12], ilea[4], ilia[4], leal[4], inia[4], elan[4], lane[4], lean[4], anil[4], lain[4], nail[4], lien[4], line[4], nill[4], aloe[4], olea[4], olla[4], lilo[4], aeon[4], naoi[4], loan[4], enol[4], leno[4], lone[4], noel[4], lino[4], lion[4], loin[4], noil[4], earl[4], lear[4], rale[4], real[4], aril[4], lair[4], lari[4], liar[4], lira[4], rail[4], rial[4], lier[4], lire[4], riel[4], rile[4], liri[4], rill[4], earn[4], near[4], airn[4], rain[4], rani[4], rein[4], aero[4], oral[4], lore[4], orle[4], role[4], roil[4], roll[4], roan[4], inro[4], iron[4], noir[4], nori[4], lorn[4]

3 letter words

lez[11], zin[11], azo[11], zoa[11], ale[3], lea[3], ail[3], lei[3], lie[3], all[3], ell[3], ill[3], ane[3], nae[3], ain[3], ani[3], lin[3], nil[3], ole[3], oil[3], eon[3], one[3], ion[3], are[3], ear[3], era[3], air[3], rai[3], ria[3], ire[3], rei[3], lar[3], ran[3], ern[3], rin[3], oar[3], ora[3], ore[3], roe[3], nor[3]

2 letter words

ae[2], ai[2], al[2], la[2], el[2], li[2], an[2], na[2], en[2], ne[2]