Or search: poll, probe, query, canvass, enquiry, inquest, inquiring, interrogation, investigating, experimentation
2 Syllables: SU
crises, diaries, diary, fiery, Fridays, ivory, Priory
3 Syllables: SUU
binary, bribery, diocese, dynasties, finery, gingerly, industries, industry's, injuries, injury, inquiry, inwardly, linearly, primaries, principes, sympathies, symphonies
3 Syllables: USU
enquiries, enquiry, entirely, entirety, untiring
4 Syllables: USUU
advisory, anxieties, contingencies, delinquencies, proprieties, refineries, refinery, varieties
5 Syllables: UUSUU
supervisory
6 Syllables: UUUSUU
idiosyncrasies

Found 39 words across 6 groupings. Skipped 1 excess word of a similar stem.