3 syllables:
fencible, fensi-ble, pensible, sensibile, sensible, tensible

4 syllables:
compensable, condensable, condensible, defensible, dispensable, distensible, extensible, immensible, insensible, offensible, ostensible, prehensi-ble, prehensible, subsensible, suspensible, unsensible

5 syllables:
apprehensible, commonsensible, comprehensible, deprehensible, incondensible, indefensible, indispensable, indispensible, inextensible, noncondensible, reprehensible, supersensible, undispensable

6 syllables:
hyperextensible, inapprehensible, incomprehensible, indeprehensible, irreprehensible, unapprehensible, uncomprehensible

3 syllables:
tenable, equable, estival, medical, sensual, stretchable, skeletal, sextuple, pessimal, edible, meltable, vegetable, vendible, retinal, festival, aestival, flexible, spectacle, sentinel, pedestal, sepulchral, bendable, legible, credible, methanal, peccable, epochal, plentiful, sectional, seconal, decimal, vegetal, seneschal, genital, skeptical, ethical, gettable, tentacle, testable, jezebel, seminal, rentable, pennoncel, requital, spendable, chemical, pentacle

4 syllables:
impregnable, acceptable, ineffable, conventicle, dimensional, condemnable, detectable, expressible, congressional, inflectional, electable, preventable, unquenchable, processional, injectable, digestible, atenolol, adjectival, professional, illegible, heliacal, confessional, comestible, inflexible, delectable, ascendable, trigeminal, regrettable, contemptible, defendable, correctional, extendable, untenable, amendable, centesimal, accessible, commendable, amenable, intestinal, respectable, affectional, collectible, lamentable, expendable, directional, correctable, perceptible, receptacle, contestable, execrable, recessional, polemical, incredible, conceptional, dependable, detestable, congenital, preferable, impeccable, forgettable, collectable, compressible, susceptible, obsessional, conventional, intentional, inedible, exceptional

5 syllables:
hexadecimal, unexceptional, incompressible, bidirectional, inaccessible, undependable, three-dimensional, neurochemical, unconventional, nonprofessional, two-dimensional, unintentional, indigestible, hypothetical, inexpressible, irrepressible, pyrotechnical, insurrectional, planetesimal, unforgettable, insusceptible, health professional, unacceptable, homosexual, unprofessional

6 syllables:
omnidirectional, semiprofessional, heterosexual, recurring decimal, unidirectional, repeating decimal, multidimensional, unidimensional, paraprofessional