Or search: gun, pile, pole, team, squad, stamp, firing, pestle, assault, barrage, ordnance, shelling, terminal, artillery, assemblage
2 Syllables: SU
families, family's
3 Syllables: SUU
Aberdeen, agonies, battery, factories, factory, fallacies, fantasies, flatteries, flattery, galleries, latterly, magazines, Majesties, Majesty's, maladies, salaries, Saturday, strategies, tapestries, Thackeray, tragedies, vanities
4 Syllables: USUU
academies, analogies, calamities, capacities, catastrophes, formalities, olfactory, realities, refractory
4 Syllables: UUSU
satisfactory
5 Syllables: UUSUU
abnormalities, generalities, manufactories, manufactory, technicalities
6 Syllables: UUUSUU
unsatisfactory

Found 40 words across 6 groupings. Skipped 1 excess word of a similar stem.