Or search: lyssa, rabies, anthrax, madness, yatobyo, glanders, tularemia, tularaemia, brucellosis, hydrophobia, actinomycosis, leptospirosis
3 Syllables: SUU
botanist, colonist, congresses, dramatist, obelisk, opposites, politics, Thomas's
4 Syllables: USUU
Apocalypse, apologist, biologist, economist, geologists, unconsciousness
5 Syllables: UUSUU
anthropologist, archaeologist, physiologist, sociologist

Found 18 words across 3 groupings. Skipped 10 excess words of a similar stem.