1 syllable:
-tron, aune, baughn, baun, bon, bonn, bonne, braun, braune, brawn, brdm-1, bronn, caan, caen, chaun, chon, chouan, chron-, con, conn, conn., conne, craun, crohn, cron, daane, dahn, daun, dawn, dawne, dohn, don, donn, draughn, drawn, dwan, fahne, faughn, faune, fawn, fcron, flawn, fluon, fonne, frohn, gawne, gnawn, gohn, gone, gonne, graan, haan, hahn, han, haughn, haun, hawn, hohn, hon, honn, hron, huan, hwan, j-kwon, jaan, jaune, jcsan, john, jon, jonn, jonne, juan, jwan, kahn, khan, kjwan, knaan, kohn, kon, kraan, kron, krs-one, kuan, kwan, kwon, laun, laune, lawn, lian, lohn, lon, maune, mohn, monn, njaan, non, nonne, paune, pawn, pfm-1, pon, pran, praun, prawn, psrl-1, quan, quon, raun, rds-1, rohn, ron, ronne, sahne, schaan, schon, schwahn, schwan, schwann, scian, sd-wan, sean, sgr-a1, shahn, shaun, shawn, shon, shonn, sohn, sonn, sonne, spahn, spawn, splawn, spohn, staan, straughn, strawn, swan, swann, thon, thrawn, tian, tonn, traan, traun, tron, trpa1, vaughan, vaughn, von, wan, wann, xan, xian, xuan, yaun, yawn, yohn, yon, zaun, zhan, zhuan, zon, zwaan

2 syllables:
1-5-7-1, 10g-pon, 3-1-1, 8-n-1, a-kon, aae-1, aazaan, abron, accon, adcon, add-on, adon, aeson, afcon, agron, ahaan, ahsan, air-drawn, aitan, ajahn, alaun, alcon, all-bran, alon, alraune, amman, amnon, amon, angon, antoine, anton, aravaan, arawn, ardon, argon, argonne, armaan, arton, ashcan, assan, assuan, aswan, aton, auron, aurone, avcon, axon, aydan, ayon, azlon, azzan, back-on, badon, bajan, balon, balwaan, bang-on, baran, bardon, baryon, bataan, baton, becan, begnawn, bejan, bestaan, bhutan, bicron, bizon, blackswan, blue-john, bolt-on, boron, bowron, brooklawn, bubon, budaun, buisson, bukan, butan, buzon, bygone, c'mon, camon, cao'an, capon, cardon, caron, carryon, caslon, cat-1, ceylon, chandon, chang'an, chardon, cheap-john, chemlawn, chiffon, chuan, clip-on, cloisonn, cobswan, cold-drawn, come-on, comon, comtian, corron, cos-1, coupon, couronne, cray-1, crayon, cubdrawn, cylon, dacron, daflon, daikon, darbaan, daron, dawon, dead-on, deep-drawn, defcon, defconn, dejohn, deshawn, deuton, devcon, devuan, deyton, dhaharan, dhahran, didon, dijon, dingaan, dion, distron, diwan, djavan, dnouement, doiron, drag-on, dukhan, earthdawn, econ, ectoine, egon, eifion, eikon, eldon, elston, embrawn, empawn, evonne, exon, fair-lawn, fairlawn, far-gone, fasan, ferdon, fernand, fine-drawn, flow-on, foregone, forgone, foxconn, frogspawn, full-on, furan, gabon, gagan, gaitan, galon, galvan, gardon, garon, garonne, gazon, gereon, ghibran, gibran, gilan, gipon, gitan, godaan, golan, greenlawn, greenspon, groupon, guenon, guerdon, guinan, guion, gunsan, gurgaon, guslan, guzman, hacksawn, hadron, haikwan, halon, hands-on, hang-on, hard-on, hassan, haton, haytian, heaan, head-on, hebron, heilbronn, hell-on, hiran, hirwaun, hogan, horse-drawn, huai'an, hujan, huron, icon-, ihsahn, ilan, imaan, impawn, incon, indrawn, inkan, ippon, iran, ivonne, jadon, jagaaan, jalgaon, jalon, jambon, japon, jarmon, jaudon, javan, jawan, jiron, johan, jordaan, ju-on, jupon, juppon, juran, k'naan, kaappaan, kaguan, kahan, kalon, kan-on, kanaan, kanlaon, karwaan, kasaan, kedron, kim-1, kingon, knock-on, kolon, koran, krylon, kulon, kumon, kupon, kvant-1, ladon, lagaan, lalon, lamon, lasan, lat-lon, latan, lavonne, leblon, leguan, lertcon, leucon, liaison, lifson, lite-on, livan, lock-on, long-drawn, lucon, lujan, maattrraan, macron, madcon, mahlon, mahtan, maidaan, mak-kwan, manion, manon, maran, maron, massan, matan, matewan, mayon, mazon, mccaughan, mcconn, mcglaun, mecon, medon, memnon, menon, merlon, meson, micron, mid-on, midcon, milan, miran, miron, mnemon, montan, monzon, moron, moufflon, mouflon, mouscron, moutan, mouzon, mucron, muflon, naaran, nadon, nalfon, naron, nazran, necron, nem-1, neutron, nevan, nikon, nilan, nipon, nippon, niran, nitron, notpron, nylon, ocon, odds-on, oman, oran, orlon, orran, outdrawn, outfawn, oxdon, pabon, padan, padon, pailwaan, papion, paswan, pecan, peron, phlegon, photon, phylon, pierron, pignon, pilon, pinzon, pion, piron, pisan, pittcon, planecon, plasan, pompon, poor-john, popcaan, posaune, poupon, pousson, pre-dawn, predawn, prion, prom-1, proton, pull-on, put-on, pylon, qasef-1, qian, quichuan, quinton, qur'an, quran, rabban, rabon, radon, raekwon, ragon, ramtron, rashaun, rashawn, razon, redcon, redrawn, retcon, rice-bran, ridwan, right-on, ripon, roll-on, roselawn, ruban, run-on, saamstaan, sabon, saigon, salon, samaan, samhan, san-juan, sandon, sang-gon, sanxian, sawan, scazon, schiferon, schlagsahne, screw-on, seilbahn, sepawn, seyhan, sha-1, shaitan, shangaan, shavon, shavonne, shihan, shinzon, shiran, sian, sichuan, side-on, sign-on, silmon, siobhan, siran, sirhan, skrunda-1, skylawn, slem-1, slip-on, snap-on, sobon, soran, sorbonne, soupon, spot-on, stadtbahn, start-1, stephane, stick-on, stjohn, strap-on, sts-1, supawn, suppawn, suran, suwon, suzlon, switched-on, symtron, syzran, tacan, tahaan, tai'an, taiwan, tan-1, tarkhan, tat-1, tatian, tehran, teuton, thereon, tie-on, tiran, tiron, tiyaan, tobon, tomjohn, toofaan, toran, toron, tos-1, traian, trapan, trashcan, triduan, trogon, try-on, tucson, turn-on, turned-on, turon, tutsan, twitchcon, u-kwon, uconn, undrawn, upjohn, upon, ur-quan, utf-1, utthaan, vagon, valon, varan, vardon, varnon, varon, vasan, verdon, vidcon, vivyan, von-braun, vyvyan, wakhan, walk-on, walkon, walon, wanxian, watchcon, watsan, waylon, wazan, westbahn, whereon, whipsawn, wiredrawn, withdrawn, woodlawn, worldcon, wuhuan, xi'an, xingtian, xiong'an, ya'an, yahaan, yan'an, yaohan, yeontan, yinchuan, yirng-an, yongbyon, youpon, yuan, yukon, yupon, yvonne, zalon, zygon

3 syllables:
009-1, 2-1-1, 3-2-1, 4-1-1, 9-1-1, abidjan, absalon, absolon, accaron, accouchement, ad-dukhan, adriaan, aglycon, aguillon, agumon, aijalon, aileron, ajalon, akutan, al-furqan, alarcon, albashaun, alderaan, aleron, alkoran, allantoin, almazan, always-on, amadon, amaran, amaron, amazon, amblygon, andijon, andizhan, anirvan, anticon, antiphon, apagon, apodan, apple-john, aquilon, aragon, arakan, arbitron, archelon, ascalon, athiran, atragon, auberon, aurizon, autobahn, autobon, avalon, avignon, ayalaan, azerbadjan, b-meson, babalon, babylon, balaban, balafon, balaton, balmacaan, baragon, barracan, basajaun, benzion, berrichonne, bhadgaon, bhagavan, biberon, biocon, blepharon, bmd-1, bobbejaan, botolan, cabletron, cadogan, calecon, callejon, cardamon, carillon, carreon, carry-on, cast-iron, castellan, cataian, catala, catchacan, catholicon, celadon, cephalon, chaetodon, champignon, chapoton, chesalon, chiitan, chormaqan, choronzon, chotushkone, christiaan, christiane, christianne, churchillian, cimarron, cinnabon, clevedon, cluricaune, clurichaun, cobiron, comecon, comicon, comicstaan, confalon, contakion, coracan, cornichon, cosmotron, counterdrawn, couvillion, couvillon, cramp-iron, cynodon, cypruslawn, d'aubuisson, daeodon, dainippon, dalapon, dameron, daricon, davignon, demijohn, denouement, deuteron, digicon, diictodon, dinuguan, dipylon, dog-iron, dongguan, dorion, dungarvan, echelon, eidolon, eighty-one, embouchement, embranchement, embryon, enercon, engouement, enthiran, epsilon, erawan, erbakan, erdogan, erion, escalon, espadon, etalon, ethicon, falchion, fansipan, farrakhan, favicon, fenelon, fifty-one, filmistaan, finedrawn, follow-on, forty-one, fujisan, gabaldon, gaganyaan, ganelon, ganglion, gashapon, germiston, glamazon, glucagon, glyptodon, gohonzon, goings-on, gonfalon, grandmaison, guayacan, guei-yuan, guitarron, gyrotron, hackathon, hairatan, hammer-on, hanger-on, hangers-on, hardymon, hargadon, harpagon, harpsichon, haute-garonne, hayastan, hebenon, helicon, hendrawan, hereupon, hermiston, hexagon, hexapawn, hezion, hibagon, hiropon, histrion, horicon, hormuzan, huascaran, huracan, hyopastron, hypalon, icam-1, ichiran, ichneumon, iitran, imtihaan, infobahn, infotron, inishmaan, irelan, iron-on, isagon, iserlohn, jirisan, joffrion, jonatan, k-meson, kaamatan, kairouan, kanokon, kapsalon, kazakhstan, kebangsaan, kenbak-1, kiloton, kodokan, kosovan, koyukon, kreayshawn, kumamon, kuselan, kuthiran, kylotonn, kyrgyzstan, langebaan, latihan, lavasan, leguaan, leontodon, leprechaun, lexicon, lexikon, limaon, linuron, lippizan, liqian, lissabon, littlejohn, logicon, lolicon, looker-on, lookers-on, lorawan, luberon, lyricon, ma-ayon, machhegaun, madelon, magadhan, magnetron, maintenon, makaron, malabon, mamelon, mandekan, manthrikan, many-one, maracan, marathon, marienbonn, marjaavaan, masaan, mastadon, mastodon, matalon, matapan, matignon, mattawan, megafon, megagon, megalon, megatron, menaion, menazon, meuse-argonne, mikoyan, mikrofon, militran, minecon, modicon, mogadon, moldovan, molokan, molokane, monacan, mondragon, monoszon, montavon, montlucon, moondragon, morion, moseley-braun, mpeg-1, mu-meson, multitran, musakhan, nafion, nanshin-ron, nariphon, nasicon, nauruan, neocron, netrikann, nijikon, ninety-one, nithuekan, noniron, nookazon, noumenon, oberon, oceaan, octagon, octodon, oerlikon, off-and-on, oleron, omadhaun, omicron, ommadawn, oophoron, oregon, orgonon, oricon, ortegon, orthicon, ortolan, ottawan, overdrawn, overgone, oxygon, paduan, paleron, pantalon, pantheon, paragon, parmesan, parthenon, pasotron, patagon, patapon, patxaran, peleton, pendragon, pentacron, pentagon, perignon, phlegethon, phytotron, pi-meson, picodon, pig-iron, pirathon, plamondon, polruan, polygon, porion, portcrayon, portolan, positron, powercon, propylon, proturan, pulegone, put-upon, putter-on, qingyuan, quakecon, quartersawn, radovan, ragavan, ramadan, ramazan, ramratan, rapprochement, rassilon, reblochon, redcon-1, reliquian, remeron, reveron, rhincodon, rhythmicon, rigodon, rituxan, rostov-don, ruabon, rudram-1, russia-1, ryukyuan, sabaton, sabayon, sadiyaan, sakuran, salceson, salmeron, salpicon, salvarsan, sandakan, sandalphon, sanjuan, sars-cov-1, sasmuan, saticon, scrap-iron, semicon, seowon, septagon, shahmaran, shaktimaan, shanhaiguan, shaoguan, sharekhan, shemiran, shiggaon, shotacon, shotokan, shtora-1, siabon, sigaultian, siheyuan, simenon, simion, sinequan, sixty-one, skepticon, skokiaan, slobodan, solid-drawn, sossamon, spectralon, sphericon, stegodon, stramazoun, sungkyunkwan, swabhimaan, syndecan, taichichuan, taiyuan, takuan, talkathon, taloqan, tanacon, tanhaiyaan, tarakan, tarragon, tawuran, technicon, technikon, teheran, telecon, telefon, teletron, tetrodon, tetuan, thamizhan, theocon, thereupon, thilakan, thiodan, thirty-one, tiburon, tolstoyan, toxodon, trachodon, tregaron, trijicon, triptykon, trypticon, tsingyuan, twenty-one, typicon, ultion, unadon, undergone, upsilon, urion, uttaran, vanderlaan, vessicnon, vessignon, vidicon, villagran, villalon, vinylon, walkathon, wel-begone, whereupon, woe-begone, woebegone, wondercon, wonderswan, wrestle-1, wrought-iron, youngistaan, ypsilon, zamarron, zaratan, zephiran, zeuglodon, zhongyuan, zhuangyuan, zileuton

4 syllables:
aberavon, aberdaron, abumeron, acerodon, achorion, agamemnon, agkistrodon, akhenaton, akhetaton, alabastron, aliboron, aluminon, amphiprion, ancistrodon, anti-neutron, antimeson, antineutron, antitauon, apeirogon, arabichon, arabicon, ashwaubenon, automaton, azerbaidjan, azerbaidzhan, azerbaijan, azerbajdzhan, balopticon, basilicon, betaseron, birobidzhan, bmp-1, cancellarean, carrying-on, carryings-on, catch-as-catch-can, ceroxylon, chalazion, cherubikon, chiniquodon, chittaranjan, chloroxylon, chylomicron, colossalcon, dakotadon, decapodan, decepticon, dendromecon, diachylon, dicamptodon, diencephalon, dimetrodon, dimorphodon, dinakaran, diprotodon, dorsimeson, ekaboron, emoticon, encephalon, endecagon, enneagon, epimeron, euphonicon, ey-parthenon, fanimecon, fosse/verdon, freerayshawn, futurikon, galaxycon, half-marathon, harmonicon, harmoniphon, heliodon, heterodon, hexaemeron, hexameron, hisilicon, hokushin-ron, homologon, hydraulicon, icosagon, idazoxan, identicon, inclisiran, irenicon, j/apg-1, jayamkondaan, kamelaukion, kamptulicon, kappa-meson, khumariyaan, kolokol-1, kontakion, lamentis-1, lathomenon, lcm-1e, legomenon, liaoyuan, lot-et-garonne, maniglion, manmarziyaan, menelaion, metroxylon, micromicron, millimicron, milnacipran, misliya-1, monasticon, monoxylon, myriagon, myroxylon, nakhichevan, napolitan, narasimhan, naresuan, neencephalon, negaprion, nicolaitan, nychthemeron, nycthemeron, octaemeron, olajuwon, ophiodon, oradexon, oxxxymiron, oyakodon, pantechnicon, paregmenon, paroophoron, patisiran, pdp-1, pendelikon, pentelikon, perperikon, phenomenon, photoneutron, phytomeron, platycodon, politicon, polyacron, polyodon, polyprion, procoptodon, prognathodon, pteropogon, quindecagon, rajnandgaon, ramanujan, ramphomicron, regeneron, reichsautobahn, rostov-on-don, rpg-1, santistevan, saskatchewan, sentinel-1, seventy-one, sizofiran, solenodon, sphenacodon, sphyrelaton, sreenivasan, srinivasan, steropodon, stm-1, stumbleupon, stylomecon, suburbicon, suseenthiran, syncytin-1, syntopicon, tanganyikan, tarn-et-garonne, tetrapylon, thrinaxodon, tianwen-1, trimetrogon, tripolitan, tuvaluan, untergrundbahn, uralmash-1, ventrimeson, vetrimaaran, vetrimaran, videocon, videolan, videotron, visithiran, wulingyuan, xiphosuran, zero-coupon, zwitterion

5 syllables:
adiaphoron, antideuteron, apollonicon, archencephalon, bangabandhu-1, bewakoofiyaan, catanauan, cctv-1, chandrayaan-1, cryptonomicon, deinagkistrodon, deutencephalon, diacatholicon, diaconicon, diatessaron, ediacaran, ekasilicon, embera-wounaan, encarnacion, entomostracan, epencephalon, erythroxylon, estcube-1, exaeretodon, ferrosilicon, haematoxylon, helicoprion, hexahemeron, hydramethylnon, hypsilophodon, idioticon, kalaiyarasan, kochadaiiyaan, liopleurodon, lycopersicon, macrocephalon, malacosteon, melanoxylon, mesencephalon, mesocephalon, metencephalon, mixotoxodon, mobiltelefon, monotessaron, necronomicon, nekrogoblikon, neonomicon, notiomastodon, omophorion, onomasticon, open-silicon, otacousticon, otoganglion, paleencephalon, paraganglion, patagotitan, perilipin-1, perispomenon, phaenomenon, phi-phenomenon, platybelodon, polysilicon, postencephalon, prolegomenon, prosencephalon, pseudoganglion, pyriphlegethon, radiopticon, rhinencephalon, rhombencephalon, sangathamizhan, schizopetalon, shukrayaan-1, sideroxylon, stegomastodon, stereopticon, synonymicon, t.e.v.i.n., technobabylon, telencephalon, thalmencephalon, thinkalkalamaan, udaariyaan, ultramarathon, vasoganglion, vaudreuil-dorion, vcam-1

6 syllables:
65537-gon, epiphenomenon, etymologicon, haematencephalon, krypterophaneron, levomilnacipran, myelencephalon, neoencephalon, organosilicon, palaeencephalon, palaeoloxodon, pangasianodon, paralipomenon, properispomenon, thalamencephalon, varennes-en-argonne

7 syllables:
constantinopolitan, hamamelidoxylon, manushyaputhiran, palaeoencephalon, paleoencephalon, semidiatessaron

8 syllables:
ssss.dynazenon