Or search: muir, oken, botany, darwin, gesner, hudson, agassiz, steller, wallace, zoology, lamarck, biologist, phytology, philosopher
3 Syllables: SUU
aggregates, analyst, apposite, Arabic, asterisk, candidate, catalyst, Federalists, nationalist, vassalage
4 Syllables: SUUU
capitalist, rationalist
4 Syllables: USUU
anatomist, Annapolis
5 Syllables: UUSUU
Indianapolis, Minneapolis

Found 16 words across 4 groupings. Skipped 4 excess words of a similar stem.