3 Syllables: SUU
4 Syllables: SUUU
charitable, creditable, eligible, equitable, estimable, knowledgeable, measurable, memorable, negligible, pleasurable, separable, venerable
5 Syllables: USUUU
impenetrable, impressionable, incorrigible, inequitable, inestimable, inevitable, inseparable, intelligible, irrefragable, irreparable, irrevocable
Found 24 words across 3 groupings.