2 Syllables: SU
abjured, actor, adder, Adler, adverse, advert, Amherst, amor, Astor, azure, bachelor, backers, backward, badger, banner, bastard, batter, Baxter, bearer, Becker, Bedford, beggar, better, blackbird, Blackburn, blacker, bladder, Bradford, captor, capture, Caspar, castor, catcher, cavern, cellar, center, chapter, chatter, checkered, chequered, Cheshire, Chester, clamor, clamour, clatter, clever, cracker, dagger, debtor, Decker, desert, Dexter, dresser, dweller, Edgar, Edward, effort, enter, error, Esther, ever, excerpt, expert, factor, fairer, fanner, faster, fatter, feather, feller, fetter, flatter, Fletcher, fracture, fresher, gather, gether, glamour, grammar, guesswork, haggard, hammer, happier, Havre, hazard, heather, Hector, heifer, Heller, Hester, Jasper, jester, Keller, Kepler, lacquer, ladder, lather, latter, latter's, leather, leathern, lecture, ledger, Leicester, leisure, Leonard, leopard, leper, lesser, Lester, letter, lever, madder, manner, manor, master, mater, Mather, matter, measure, Messrs, nectar, Nestor, nether, network, never, Packard, pallor, passer, pastor, patchwork, patter, pattern, peddlers, pepper, pestered, placard, planner, plaster, platter, pleasure, pressure, rapture, rarer, rather, readier, record, rector, redder, sadder, Saturn, satyrs, scabbard, scatter, sceptre, sector, seller, setter, settler, sever, Severn, sharer, shatter, Shepard, shepherd, Sheppard, specter, spectre, Stafford, stagger, stammer, stature, steadier, stellar, stragglers, Stratford, stretcher, swagger, sweater, Tanner, tattered, tatters, tavern, teller, tenor, terror, tester, tether, texture, tractor, traveler, Travers, traverse, treasure, tremor, Trevor, valor, valour, vaster, vector, Wagner, wearer, weather, Weber, Webster, Webster's, Western, westward, whether, wrapper, zephyr
3 Syllables: USU
4 Syllables: UUSU
altogether, howsoever, Madagascar, manufacture, whatsoever, wheresoever, whomsoever, whosoever
5 Syllables: UUUSU
Nebuchadnezzar, whithersoever

Found 273 words across 4 groupings. Skipped 136 excess words of a similar stem.