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From letters C, A, R, D, I, O, T, O, N, I, C  I made following words

11 letter words

cardiotonic[16]

10 letter words

carotinoid[13]

9 letter words

carcinoid[14], accordion[14], corticoid[14], concordat[14], indicator[12]

8 letter words

cancroid[13], draconic[13], coracoid[13], acidotic[13], carditic[13], dicrotic[13], aconitic[12], cationic[12], coaction[12], cratonic[12], narcotic[12], actinoid[11], diatonic[11], tornadic[11], indictor[11], acrodont[11], iodation[9], tandoori[9]

7 letter words

cricoid[12], concord[12], cactoid[12], octadic[12], acronic[11], raccoon[11], actinic[11], acrotic[11], coactor[11], conidia[10], crinoid[10], cardoon[10], diction[10], triacid[10], triadic[10], carotid[10], coition[9], carotin[9], cortina[9], noritic[9], cartoon[9], coranto[9], diatron[8], dinitro[8], donator[8], odorant[8], tandoor[8], tornado[8], oration[7]

6 letter words

acidic[11], accord[11], acinic[10], cocain[10], iconic[10], cantic[10], ocicat[10], arctic[10], citric[10], critic[10], anodic[9], conoid[9], rancid[9], cardio[9], candor[9], cardon[9], dacron[9], nordic[9], condor[9], cordon[9], indict[9], dacoit[9], doctor[9], ironic[8], corona[8], racoon[8], action[8], atonic[8], cation[8], iatric[8], citrin[8], nitric[8], aortic[8], cantor[8], carton[8], contra[8], craton[8], citron[8], cortin[8], octroi[8], croton[8], inroad[7], ordain[7], indoor[7], nitrid[7], adroit[7], toroid[7], aroint[6], ration[6], ratoon[6]

5 letter words

conic[9], cocoa[9], circa[9], croci[9], cacti[9], ictic[9], coact[9], canid[8], cnida[8], nicad[8], iodic[8], codon[8], condo[8], acrid[8], caird[8], daric[8], dicta[8], octad[8], dicot[8], acini[7], ionic[7], cairn[7], naric[7], ricin[7], coria[7], acorn[7], narco[7], racon[7], orcin[7], croon[7], actin[7], antic[7], coati[7], canto[7], cotan[7], octan[7], ontic[7], tonic[7], conto[7], triac[7], actor[7], taroc[7], toric[7], oidia[6], danio[6], iodin[6], radii[6], dinar[6], drain[6], nadir[6], ranid[6], indri[6], aroid[6], radio[6], adorn[6], andro[6], radon[6], donor[6], rondo[6], nitid[6], idiot[6], tondi[6], ootid[6], tondo[6], triad[6], tardo[6], droit[6], noria[5], riant[5], train[5], ratio[5], torii[5], trona[5], intro[5], nitro[5]

4 letter words

coca[8], coco[8], acid[7], cadi[7], caid[7], coda[7], odic[7], card[7], cain[6], ciao[6], cion[6], coin[6], coni[6], icon[6], coon[6], nidi[5], dona[5], dino[5], nodi[5], inia[4], naoi[4]