Or search: steep, usurious, exorbitant, outrageous, immoderate, unconscionable
2 Syllables: SU
corporate
3 Syllables: SUU
formulate, fortunate, ordinates, organist
4 Syllables: USUU
coordinate, incorporate, proportionate, subordinate, unfortunate

Found 10 words across 3 groupings. Skipped 5 excess words of a similar stem.