1 syllable:
bet's, bets, betts, betz, bretts, bretz, debt's, debts, fettes, fetz, fgets, frets, fretz, gets, getts, getz, ghetts, goetz, greitz, gretz, hetz, jet's, jets, jets', jett's, jetts, ketz, kretz, let's, lets, letts, letz, lletz, met's, mets, mets', metts, metz, nets, netts, netz, pet's, pets, petz, pletz, retz, sets, setts, spets, stets, stetz, sweats, swetz, threats, trets, vets, wetz, whets

2 syllables:
abets, aigrettes, amvets, assets, baguettes, barbettes, barnett's, barrettes, begets, beignets, berlet's, besets, blue jets, bonesets, botnets, brassets, brevets, briquettes, brochettes, brunets, brunettes, burettes, burnett's, cadets, carets, cassettes, chametz, chipsets, chometz, clarets, coquettes, cornets, cornettes, corvettes, cosets, couchettes, courgettes, crevettes, croquettes, curettes, cuvettes, dinettes, diskettes, dragnets, duets, eastmet's, flechettes, forgets, fourchettes, gazettes, genets, georgettes, gesetz, gillette's, godets, gorets, grisettes, handsets, harmetz, headsets, hoevet's, inlets, insets, jenrette's, jouret's, kmetz, kuznets, labrets, ladettes, laundrettes, layettes, liggett's, lorgnettes, louchettes, lunettes, maquettes, mind-sets, mindsets, mofettes, moonsets, motets, musettes, netjets, noisettes, non-jets, nonets, nonjets, octets, odets, offsets, onsets, outlet's, outlets, ovett's, paillettes, palmettes, pipets, pipettes, planchettes, plaquettes, presets, projets, quartet's, quartets, quartettes, quicksets, quintets, quintettes, ramjets, ranchettes, regrets, resets, revets, rillettes, rockettes, roomettes, rosettes, roulette's, roulettes, sassnet's, sassnets, scramjets, seajets, septets, septettes, sestets, sextets, sextettes, soubrettes, spinets, sublets, subnets, subsets, sunsets, tassets, telnets, tourette's, tourettes, trainsets, twinjets, typesets, upsets, vedettes, vignettes, wavelets

3 syllables:
aerojets, aiguillettes, alkanets, allumettes, alouettes, alphabets, avocets, baronets, basinets, bayonets, cabernets, calumets, canzonets, carteret's, cassoulets, castanets, chrissy metz, cigarets, cigarette's, cigarettes, clarinets, coronets, dragonets, epaulettes, epithets, exocets, falconets, flageolets, internet's, internets, kitchenettes, konevets, kremenets, larroquette's, launderettes, lazarets, lazarettes, luncheonettes, maisonettes, maisonnettes, majorettes, marmosets, martinets, massenet's, midinettes, mignonettes, minarets, minuets, novelettes, olonets, oubliettes, oversets, pantalettes, parapets, photosets, pinochet's, pirouettes, quodlibets, r/wallstreetbets, salopettes, serviettes, silhouettes, solonetz, somersets, soviet's, soviets, soviets', statuettes, stockinets, suffragettes, summersets, superhets, taborets, tabourets, thermosets, towelettes, tracy letts, truskavets, turbojets, usherettes, valujet's, vinaigrettes, willamette's

4 syllables:
amy seimetz, bachelorettes, electrojets, isohyets, marionettes, plantagenets, winnipeg jets

5 syllables:
as good as it gets, audiocassettes, list of amd chipsets, pedioecetes, videocassettes

6 syllables:
list of utc time offsets

7 syllables:
bundesdatenschutzgesetz

2 syllables:
illness, shrillness, stillness

4 syllables:
mental illness

7 syllables:
manic depressive illness