1 Syllable: S
2 Syllables: SU
Brewer, Brewster, cooler, Cooper, Cooper's, Cowper, cruder, cruiser, doers, fewer, future, Hooper, Hoover, Hubert, humor, humour, junior, looser, loser, Lucerne, lucre, lunar, Luther, mover, Mueller, neuter, Newark, newer, nuclear, pewter, poorer, ruder, ruler, rumor, rumour, Rupert, schooner, Schuster, Seward, sewer, smoother, sooner, steward, Stewart, Stewart's, Stuarts, stupor, suitor, super, trooper, truer, Tudor, tumor, tutor, user, viewer
3 Syllables: USU
accuser, computer, consumer, intruder, maneuver, manoeuvre, peculiar, producer, pursuer, reviewer, seducer, untutored, Vancouver
Found 70 words across 3 groupings. Skipped 32 excess words of a similar stem.