1 syllable:
bonn's, bonnes, bonze, braun's, brauns, brawns, brons, bronz, bronze, caen's, chrons, cohns, cons, crohns, dawn's, dawns, don's, donnes, dons, donze, fauns, fawns, fons, fonz, frons, han's, hons, hwan's, jahns, john's, johns, jon's, kahn's, khan's, konz, konze, korns, lawns, lian's, lons, maans, naans, ons, pawns, phaans, pons, prawns, ron's, saans, schons, sean's, shawn's, sohns, sons', spawns, spons, swann's, swans, trons, vaughan's, vaughn's, vaughns, vons, wanze, yawns

2 syllables:
add-ons, ah-1z, alphons, alphonse, antoine's, archons, ashcans, axons, ayons, batons, bionz, bygones, capons, chemlawn's, chiffons, cistrons, clip-ons, come-ons, coupons, crayons, distanz, diwans, econs, embronze, geoff johns, gnomons, guenons, halons, hogan's, hogans, hurons, ibans, icons, iconz, ions, jalons, kahan's, kinfauns, klingons, klystrons, lachanze, lat-lons, leptons, lifson's, livan's, longjohns, long johns, macrons, merlons, mesons, micron's, microns, milan's, moron's, morons, moufflons, mouflons, natanz, neons, neutrons, nylons, omans, pecans, photons, pisans, pompons, proton's, protons, put-ons, pylons, roselawn's, run-ons, saint-saens, saint john's, salons, schiferon's, slip-ons, st-johns, strap-ons, st johns, taiwan's, tehran's, tehrans, trogons, try-ons, turn-ons, upjohn's, walk-ons, yongbyon's, yuan's, yuans, yvonne's

3 syllables:
afrikaans, ailerons, alpha bronze, amazon's, amazons, authochthons, autobahns, autochthons, avalon's, avalons, beauxbatons, cabletron's, cabochons, carillons, carry-ons, catalans, catholicons, colophons, cornichons, demijohns, deuterons, echelons, eidolons, epsilons, erbakan's, eulachons, farrakhan's, flaperons, flatirons, follow-ons, ganglions, germiston's, goings-ons, helicons, hyperons, ichneumons, infotron's, kazakhstan's, leaded bronze, leprechauns, lexicons, liaisons, longerons, lubicons, macarons, magnetons, magnetrons, mamelons, marathons, marienbonn's, mastodons, mysticons, nickel bronze, nithuekan's, omicrons, oregon's, organons, ortolans, pantalons, pantheons, paragons, pelotons, pentacrons, pentagon's, pentagons, percherons, phosphor-bronze, phosphor bronze, positrons, ragavan's, reveron's, rubicons, teheran's, teherans, tobin bronze, trilithons, upsilons, vidicons

4 syllables:
abutilons, agamemnon's, antiprotons, arabichon's, archenterons, automatons, azerbaijan's, bandoneons, chylomicrons, decurions, diencephalons, emoticons, manganese bronze, olajuwon's, ovigerons, phenomenons, semicolons, silicon bronze

5 syllables:
aluminium bronze, aluminum bronze, anacoluthons, beryllium bronze, rhombencephalons, stereopticons, telencephalons

6 syllables:
list of emoticons

3 syllables:
catalogs