2 Syllables: SU
Beaufort, blower, boarders, border, broker, chauffeur, closer, closure, clover, coarser, corner, courtier, covert, donor, Dover, foreigner, Foreword, former, Forster, forward, grocer, grosser, Grover, grower, Homer, Homer's, horror, lower, moder, molar, mortar, motor, mourner, nobler, northern, northward, Notre, ochre, oder, odor, odour, orchard, order, over, overt, owner, poker, polar, porter, poster, Puerto, quarter, roller, Rover, rowers, shorter, slower, smoker, sober, sojourn, solar, sower, torpor, torture, voter, warmer, Warner, warrior, Yorker, Yorkshire
3 Syllables: SUU
3 Syllables: USU
composer, composure, controller, disclosure, disorder, enclosure, explorer, exporters, exposure, henceforward, importer, inclosure, informer, misnomer, Moreover, October, performer, promoter, recorder, reformer, remoter, reporter, restorer, straightforward, supporter, thenceforward, threequarters, transformer
4 Syllables: UUSU
Found 100 words across 4 groupings. Skipped 52 excess words of a similar stem.