2 syllables:
cipal, couple, ruppel, stsc apl, supple, the pill, uppile

3 syllables:
accouple, a couple, centuple, decouple, octuple, quintuple, uncouple

4 syllables:
married couple, subquintuple, subsextuple, supercouple, thermocouple

2 syllables:
bubble, buckle, chuckle, cuddle, cuttle, double, fuddle, guggle, guttle, hubbell, hubble, huddle, juggle, knuckle, muckle, muddle, puddle, rubble, ruckle, ruddle, scuttle, shuttle, smuggle, snuggle, struggle, stubble, subtle, suckle, trouble, truckle, what'll

3 syllables:
tenable, equable, estival, medical, stretchable, sensual, skeletal, 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, air bubble, befuddle, belt buckle, class struggle, coal scuttle, in trouble, line double, mud puddle, rebuttal, redouble, soap bubble, unsubtle

4 syllables:
impregnable, acceptable, ineffable, conventicle, dimensional, condemnable, detectable, expressible, compensable, congressional, inflectional, electable, dispensable, preventable, unquenchable, processional, injectable, digestible, adjectival, atenolol, professional, illegible, heliacal, confessional, comestible, inflexible, delectable, insensible, ascendable, defensible, 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, ostensible, preferable, impeccable, forgettable, collectable, compressible, susceptible, obsessional, conventional, intentional, inedible, exceptional, extensible, ask for trouble, daily double, hubble-bubble

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

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