Or search: enigma, whodunit, perplexity
2 Syllables: SU
histories, history
3 Syllables: SUU
fisheries, fishery, liveries, livery, miseries, misery, mystery, Philippines, Philistines, Pyrenees, similes, tyrannies, vicarage
3 Syllables: USU
deliveries
4 Syllables: USUU
abilities, affinities, antipathies, antipodes, antiquities, civilities, consistory, conspiracies, delivery, divinities, facilities, festivities, hostilities, periphery, proclivities, utilities
5 Syllables: UUSUU
aborigines, capabilities, disabilities, liabilities, possibilities, probabilities
6 Syllables: UUUSUU
impossibilities, responsibilities, susceptibilities

Found 41 words across 6 groupings.