Or search: cautiously
3 Syllables: SUU
heraldry, merrily, variously, warily, wearily
4 Syllables: USUU
invariably, precariously, primarily
5 Syllables: UUSUU
customarily, militarily, momentarily, necessarily, ordinarily, secondarily, temporarily, voluntarily
6 Syllables: UUUSUU
extraordinarily

Found 17 words across 4 groupings.