2 Syllables: SU
acid, acrid, added, affix, averaged, bassett, blasted, catholic, chatted, classic, damaged, drafted, drastic, fasted, flaccid, gastric, grafted, granted, graphic, hazlitt, lasted, magic, managed, matted, packaged, padded, patted, placid, planted, plastic, rabid, rapid, ravaged, slanted, tacit, traffic, tragic, valid, vapid
3 Syllables: USU
bombastic, combated, dynastic, elastic, enchanted, engrafted, fantastic, gymnastic, mohammed, monastic, sarcastic, scholastic, thoracic, unchallenged
4 Syllables: UUSU
demographic, disadvantaged, ethnographic, geographic, inelastic, photographic, telegraphic, topographic
5 Syllables: UUUSU
Found 63 words across 4 groupings. Skipped 7 excess words of a similar stem.