Or search: lea, ley, rus, ally, cuba, fiji, wold, zion, sion, ussr, arena, brits, dutch, haiti, haunt
2 Syllables: SU
bluntly, clumsy, comely, countries, country, dummy, funny, honey, humbly, Humphrey, Humphry, hungry, Monday, money, monies, monkey, monthly, mummies, mummy, mundi, spongy, sunbeam, Sunday, sundry, sunny
3 Syllables: USU
Montgomery

Found 26 words across 2 groupings. Skipped 7 excess words of a similar stem.