2 Syllables: SU
cheerfully, cheery, cities, city's, clearly, dearly, decrease, dreary, eerie, Erie, fiercely, fieri, guineas, histories, iri, leges, lilies, merely, nearly, Petri, pities, queried, queries, query, series, Siegfried, species, theories, theory, theses, treaties, wearied, weary, wiry, yearly
3 Syllables: USU
abysses, Achilles, committees, deliveries, entreaties, machinery, severely, sincerely, Ulysses, unwearied
4 Syllables: UUSU
Found 47 words across 3 groupings. Skipped 2 excess words of a similar stem.