What rhymes with eighteen

1 Syllable
merwyn
2 Syllables
burton, eighteen, irwin, merton, pleuron, protein, tientsin
3 Syllables
albertan, avertin, bermudan, bernstein, burgundian, certain, chernomyrdin, curtain, curtained, curtaining, puritan, quercetin, tambourin, yoruban
4 Syllables
holothurian, nemertean, serotonin, uncertain
6 Syllables
semiporcelain