Showing results for "relationship" instead. (You can only search for 1 word at a time unless you use the Storm or Mosaic Rhyme tools)
Or search: descent, kinship, lineage, romance, affinity, maternity, paternity, anaclisis, cognation, filiation, membership, subjection, affiliation, partnership, subjugation
3 Syllables: SUU
statesmanship
4 Syllables: USUU
relationships
6 Syllables: UUUSUU
interrelationship

Found 3 words across 3 groupings. Skipped 1 excess word of a similar stem.