Or search: coin, dinar, franc, penny, copper, dirham, subunit
2 Syllables: SU
Blenheim, enzyme, Gentile, lengthwise, penknife, semi
3 Syllables: USU
solemnized
4 Syllables: UUSU
operandi

Found 8 words across 3 groupings. Skipped 2 excess words of a similar stem.