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.