4 syllables:
affectable, affectible, aspectable, collectable, collectible, connectable, connectible, correctable, correctible, defectible, deflectable, delectable, depectible, detectable, detectible, dissectible, ejectable, electable, erectable, expectable, infectible, injectable, neglectable, objectable, projectable, protectable, reflectible, rejectable, resectable, respectable, selectable, suspectable

5 syllables:
disrespectable, indefectible, indelectable, ineffectible, inexpectable, irrejectable, uncollectable, uncollectible, uncorrectable, undelectable, undetectable, unelectable, uninjectable, unresectable, unrespectable

3 syllables:
tenable, equable, estival, medical, stretchable, sensual, skeletal, sextuple, pessimal, sensible, 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, denticle, edental, emmental, epical, getable, kettleful, reticle, sceptical, sellable, vendable

4 syllables:
impregnable, acceptable, ineffable, conventicle, dimensional, condemnable, expressible, compensable, congressional, inflectional, dispensable, preventable, unquenchable, processional, digestible, adjectival, atenolol, professional, illegible, heliacal, confessional, comestible, inflexible, insensible, ascendable, defensible, trigeminal, regrettable, contemptible, defendable, correctional, extendable, untenable, amendable, centesimal, accessible, commendable, amenable, intestinal, affectional, lamentable, expendable, directional, perceptible, receptacle, contestable, execrable, recessional, polemical, incredible, conceptional, dependable, detestable, congenital, ostensible, preferable, impeccable, forgettable, compressible, susceptible, obsessional, conventional, intentional, inedible, exceptional, extensible, alchemical, church festival, discretional, jazz festival, raw vegetable, redemptional, resplendent quetzel, root vegetable, stand sentinel, unbendable, unrentable, untellable

5 syllables:
hexadecimal, unexceptional, incompressible, apprehensible, comprehensible, inextensible, bidirectional, inaccessible, undependable, three-dimensional, neurochemical, indispensable, unconventional, nonprofessional, two-dimensional, unintentional, indigestible, hypothetical, inexpressible, reprehensible, irrepressible, pyrotechnical, insurrectional, indefensible, planetesimal, unforgettable, insusceptible, health professional, unacceptable, homosexual, unprofessional, catechetical, commonsensible, incontestable, incontestible, leafy vegetable, one-dimensional, third-dimensional, unaccessible, unamenable, undefendable, unexpendable, unexpressible, unpresentable, unpreventable, unsusceptible

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

7 syllables:
circulating decimal, electric receptacle