Or search: usa, u.s.
2 Syllables: SU
acreage, hastening, labeling, rationing, straightening
3 Syllables: SUU
cadences, catering, favoring, favouring, laboring, labouring, neighboring, neighbouring, patronage, tailoring, tapering, wavering
3 Syllables: USU
disabling, enabling
4 Syllables: USUU
acquaintances, awakening, conveyances, occasioning, unwavering

Found 24 words across 4 groupings.