Showing results for "magnitude" instead. (You can only search for 1 word at a time unless you use the Storm or Mosaic Rhyme tools)
Or search: bulk, dimension, intensity, largeness, measurable, mensurable, triplicity, multiplicity
3 Syllables: SUU
aptitude, attitude, gratitude, latitude, magnitudes
4 Syllables: USUU
beatitude, exactitude

Found 7 words across 2 groupings. Skipped 3 excess words of a similar stem.