Or search: waxy, pliant, plastic, spinnable, susceptible, impressible
3 Syllables: SUU
fashionable, preferable, reasonable
4 Syllables: SUUU
charitable, creditable, eligible, equitable, estimable, measurable, memorable, negligible, pardonable, pleasurable, questionable, seasonable, separable, treasonable, venerable
5 Syllables: USUUU
abominable, companionable, determinable, imaginable, impenetrable, inalienable, inequitable, inestimable, inevitable, inseparable, intelligible, interminable, irrefragable, irreparable, irrevocable, objectionable, unfashionable, unpardonable, unquestionable, unseasonable
6 Syllables: UUSUUU
unexceptionable, unintelligible

Found 40 words across 4 groupings.