2 Syllables: SU
credo, Creole, Deo, depot, eco, ego, freehold, Geo, Guido, ito, keyhole, keynote, keystone, KINO, Leo, lino, neo, Philo, primo, Rico, Rio, steamboat, Theo, threefold, trio, veto, vivo
3 Syllables: USU
4 Syllables: UUSU
Constantino, Galileo, incognito

Found 37 words across 3 groupings. Skipped 3 excess words of a similar stem.