2 Syllables: SU
breeches, bridges, British, business, clearest, clinics, crickets, critics, digits, dishes, districts, ditches, finis, finish, Finnish, fishes, Griffith, hisses, kisses, limits, lyrics, misses, missive, Mrs, mystics, niches, Philips, Phillips, Phyllis, physics, pitches, quickest, riches, rickets, ridges, spirits, stitches, switches, thickest, thinness, thinnest, tickets, visits, Willis, wishes, witches
3 Syllables: USU
derisive, diminish, dismisses, enriches, envisage, linguistics, permissive, resistless, specifics, statistics, submissive, unfinished
4 Syllables: UUSU
5 Syllables: UUUSU
Found 64 words across 4 groupings. Skipped 7 excess words of a similar stem.