2 Syllables: SU
actress, aptness, asses, axis, baptised, Baptist, batches, blackness, cactus, captious, Cassius, classes, factious, fastest, flatness, gaseous, gases, glasses, grasses, gravest, happiest, masses, matches, passage, passes, patches, rashness, savage, scratches, slackness
3 Syllables: USU
Found 37 words across 2 groupings. Skipped 1 excess word of a similar stem.