Or search: arras, tapis, edging, fabric, complexity, complexness
2 Syllables: SU
families, family's
3 Syllables: SUU
agonies, apathy, atrophy, batteries, fallacies, fantasies, flatteries, galleries, magazine, Majesties, Majesty's, maladies, salaries, strategies, strategy, tapestry, tragedies, vanities
4 Syllables: USUU
academies, analogies, calamities, capacities, catastrophes, formalities, realities
5 Syllables: UUSUU
abnormalities, generalities, technicalities

Found 30 words across 4 groupings. Skipped 1 excess word of a similar stem.