Or search: norm, modal, sport, attain, cipher, cypher, median, reckon, achieve, compute, mediocre, middling, athletics, statistic, accomplish
3 Syllables: SUU
additive, cabbages, carriages, damages, manages, pacifist, packages, parishes, passages, ravages, savages, vanishes
4 Syllables: USUU
establishes, imaginings

Found 14 words across 2 groupings.