2 Syllables: SU
bestial, Bethel, devil, Ethel, ethyl, festal, fretful, level, levelled, levels, methyl, nestle, pestle, revel, revelled, revels, special, spectral, vessel, vestal, wrestle
3 Syllables: USU
ancestral, celestial, dishevelled, especial, Ezekiel, forgetful, neglectful, orchestral, projectile, respectful, successful, terrestrial
4 Syllables: UUSU
Found 35 words across 3 groupings. Skipped 7 excess words of a similar stem.