Showing results for "concentrate" instead. (You can only search for 1 word at a time unless you use the Storm or Mosaic Rhyme tools)
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3 Syllables: SUU
commonplace, compensate, complicate, concentrates, confiscate, congregate, conjugate, consecrate, consummate, contemplate, dominate, nominate
4 Syllables: USUU
denominate, predominate, preponderate

Found 15 words across 2 groupings. Skipped 4 excess words of a similar stem.