2 Syllables: SU
3 Syllables: USU
amino, Casino, electro, electrode, Francesco, Janeiro, Marino, mosquito, mosquitoes, Othello, Pietro, Shapiro, Toledo, torpedo
4 Syllables: UUSU
Constantino, Galileo, incognito, manifesto

Found 74 words across 3 groupings. Skipped 6 excess words of a similar stem.