Or search: bum, poke, drone, idler, loafer, lagger, laggard, strayer, trailer, plodder, putterer, lingerer, potterer, straggler, slowcoach
2 Syllables: SU
foreigner
3 Syllables: SUU
auditors, commoner, globular, gossamer, jocular, monitor, ocular, officer, oftener, Oliver, popular
4 Syllables: SUUU
kilometers
4 Syllables: USUU
astrologer, astronomer, biographer, geographer, idolaters, philosopher, photographer, thermometer, unpopular
4 Syllables: UUSU
kilometres

Found 23 words across 5 groupings. Skipped 12 excess words of a similar stem.