Or search: abstractionism
1 Syllable: S
2 Syllables: SU
2 Syllables: US
affront, Amiens, among, amongst, become, begun, benumbed, Bodleian, confront, Crimean, defunct, expunged, Korean, Lyceum, outdone, outrun, plebeian, succumb, therefrom, undone
3 Syllables: SUU
3 Syllables: UUS
4 Syllables: SUUU
4 Syllables: USUU
4 Syllables: UUUS
5 Syllables: USUUU
6 Syllables: UUSUUU
6 Syllables: UUUSUU

Found 187 words across 11 groupings. Skipped 50 excess words of a similar stem.