Or search: clathraceae
2 Syllables: SU
asses, batches, Cassius, classes, fastest, gaseous, gases, glasses, grasses, gravest, masses, matches, passage, passes, patches, rashness, savage, scratches, vastness
3 Syllables: USU
Damascus, disastrous, Erasmus, molasses, Parnassus

Found 24 words across 2 groupings.