Or search: fated, doomed, trusty, trusted, destined, reliable, assurance, confident, dependable, predestined, predictable, indisputable, predestinate, foreordained, colloquialism
2 Syllables: SU
bookish, booklet, Goodrich, juris, jurist, Moorish, tourist, Zurich
3 Syllables: USU
sulphuric

Found 9 words across 2 groupings. Skipped 3 excess words of a similar stem.