2 Syllables: SU
budgets, druggist, flourish, justice, luscious, nourish, public's, publish, pulses, punish, puppets, rubbish, rustics, sluggish, suffix, summits, Sussex, Ulrich, uplift
3 Syllables: SUU
3 Syllables: USU
compulsive, convulsive, impulsive, indulges, injustice, republics, republished, repulsive, unpublished, unpunished
Found 30 words across 3 groupings. Skipped 4 excess words of a similar stem.