Or search: algonkin, algonquian, algonquin
2 Syllables: SU
almond, common, compton, conference, conscience, constance, constant, convent, johnson, johnson's, johnston, jonson, longman, omnium, quantum, taunton, thompson, thompson's, thomson, thomson's, wanton
3 Syllables: USU
despondent, inconstant, preponderance, remonstrance, respondent, uncommon, wisconsin
4 Syllables: UUSU
correspondence, correspondent

Found 30 words across 3 groupings. Skipped 6 excess words of a similar stem.