Or search: bosom, embrace, approval, blessing, espousal, approving, borrowing, acceptation, appropriation, jurisprudence, naturalization, naturalisation, misappropriation
2 Syllables: SU
Auckland, auction, audience, autumn, bottom, Brabant, broaden, Cochrane, cotton, Dobson, doctrine, Falkland, gotten, Hobson, Houghton, Ogden, option, oxen, problem, quadrant, Robin, rotten, Scotchman, Scotland, Scotsman, shotgun, sodden, Sodom, squadron, Stockton, trodden, Watson, Watson's
3 Syllables: USU
allotment, concoction, downtrodden, forgotten, untrodden

Found 38 words across 2 groupings. Skipped 11 excess words of a similar stem.