2 Syllables: SU
Aldrich, College, faultless, Hollis, knowledge, olive, polish, solstice, tallest, Wallace, Wallis
3 Syllables: USU
abolish, acknowledge, demolish, unpolished
4 Syllables: UUSU
unacknowledged

Found 16 words across 3 groupings. Skipped 5 excess words of a similar stem.