Or search: congo, zaire, kinshasa
1 Syllable: S
bill, build, built, Childe, chill, Dill, drill, fil, fill, film, filth, frills, Gil, Gill, gilt, grill, guild, guilt, hill, hilt, ilk, ill, Jill, kill, kiln, Lille, mil, milch, milk, mill, mille, mills, Milne, nil, Phil, pill, quill, quilt, rill, shrill, silk, sill, silt, skill, spill, spilt, still, stilts, thrill, til, till, tilt, trill, twill, vill, ville, wil, Wilkes, will, wilt
2 Syllables: SU
2 Syllables: US
3 Syllables: UUS

Found 80 words across 4 groupings. Skipped 43 excess words of a similar stem.