1 syllable:
boy, boye, broy, choi, choix, choy, cloy, coy, coye, croix, croy, deut-, doi, floy, foie, foy, foye, hoi, hoy, hoye, joy, joye, knoy, kroy, loy, loye, moy, moye, neu, oi, oie, oy, oye, ploy, roi, roy, roye, scheu, sgroi, soy, stoy, stroy, toy, toye, troy, woy, yoy, bhoys, boies, boy's, boyes, boys, boys', boyz, cloys, croix's, croys, dj noize, froise, hoise, joy's, joys, moise, moyes, noise, noyes, ploys, poise, roy's, roys, toise, toy's, toys, toys', troise, troyes, troys, z-boys

2 syllables:
abloy, abscheu, accloy, accoy, ahoy, alcoy, alloy, alroy, annoy, ball boy, bat boy, baudroie, beachboy, beffroi, bellboy, bellroy, besoi, bok choi, bok choy, bolshoi, borzoi, boxboy, brayboy, busboy, bushboy, calboy, callboy, candroy, carboy, carquois, chamoy, chinmoy, chinois, chinoy, claire foy, convoy, cowboy, dalstroy, dayboy, deboy, decoy, dejoy, delroy, deploy, destroy, devroy, digboi, doughboy, ellroy, elroy, emploi, employ, employe, enjoi, enjoy, envoi, estoy, eyetoy, fantroy, farmboy, farm boy, fauntroy, femboy, fermoy, fitzroy, flournoy, gameboy, gilroy, hellboy, henchboy, highboy, hoichoi, homeboy, houseboy, ixoye, joeboy, kagoy, khoikhoi, kill-joy, kilroy, kim-joy, konoye, kouroi, laboy, lacroix, lafoy, lamboy, lavoy, lenvoi, leroi, leroy, lovejoy, malloy, matoi, mccloy, mccoy, mckoy, mcroy, mcvoy, melroy, milroy, mobvoi, monroy, montjoy, montroy, moroi, mountjoy, mulroy, musgoi, mythoi, n-joi, namoi, nesoi, nimoy, nomoi, norroy, northboi, octroi, octroy, old boy, owlboy, pageboy, pak-choi, pakchoi, pakhoi, pithoi, playboy, ploughboy, plowboy, poboy, polloi, pomroy, poor boy, popejoy, psiloi, quemoy, renvoi, rob roy, rocroi, rougecroix, savoy, schoolboy, shamoy, shop boy, spartoi, steamboy, stonebwoy, streymoy, strigoi, suboi, sukhoi, surcloy, synctoy, tallboy, tatsoi, tholoi, toitoi, tolstoi, tolstoy, tomboy, topoi, tsuboi, u-roy, uncoif, vanscoy, ventoy, vickroy, whiteboy, wolf boy, yayoi, zomboy, alloys, aloys, ambroise, annoys, apoise, ardoise, b-boys, bellboys, bolshoi's, brunoise, busboys, camoys, carboys, chinoise, convoys, cowboy's, cowboys, cowboys', czechboys, deploys, destroys, doughboys, eloise, employes, employs, enjoys, fanboys, flyboys, gameboys, goodboys, ground noise, hanoi's, heloise, highboys, homeboys, houseboys, jackboys, lamboys, loud noise, lowboys, make noise, mccoys, moistboyz, newsboys, nicoise, ostkreuz, outpoise, pageboys, playboy's, playboys, plowboys, popejoy's, potboys, proud boys, savoys, schoolboys, skagboys, tallboys, tfboys, tolstoy's, tomboys, warboys, whiteboys, whiteboyz, white noise, wildboyz

3 syllables:
aizanoi, albanoi, altar boy, attaboy, backroom boy, ballyvoy, bavaroy, bogazkoy, cabin boy, canticoy, catholicoi, cfroi, charleroi, city boy, college boy, corduroy, cunjevoi, dauphinois, deveroy, diddicoy, didicoy, disemploy, domovoi, domovoy, drummer boy, erminois, errand boy, express joy, eysturoy, fauntleroy, gilderoy, gmroi, golden boy, hoi polloi, honeoye, hors-la-loi, i'itoi, iroquois, jump for joy, kablooie, kadikoy, kaiapoi, ken mcelroy, kingaroy, lisa joy, littleboy, maccaboy, macintoy, malavoi, malinois, mama's boy, mcavoy, mcelroy, mcevoy, mcilroy, mcinroy, men-yoroi, minicoy, misemploy, mother's boy, nictheroy, niteroi, office boy, omphaloi, oneiroi, overcloy, overjoy, palitoy, polevoi, pomeroy, preemploy, pronephroi, re-employ, real mccoy, redeploy, reemploy, reenjoy, sailor boy, self-destroy, shadertoy, siegfried & roy, sonny boy, stableboy, stanovoi, teddy boy, tinkertoy, unemploy, usdoi, vver-toi, water boy, whipping boy, wonder boy, wood's alloy, xanthochroi, zircaloy, anglepoise, anti-noise, antinoise, attaboys, background noise, back street boys, bavaroise, centipoise, choirboys, clonmacnoise, cockyboys, corduroys, counterpoise, dauphinoise, disemploys, equipoise, illinois's, japanoise, jojo moyes, ladyboys, millipoise, moneyboys, overjoys, overpoise, petit-pois, pet shop boys, racket boys, redeploys, risch-rotkreuz, saveloys, sunnyboys, surface noise, the lost boys, underpoise, vengaboys

4 syllables:
albert vanhoye, athinganoi, beregovoy, broth of a boy, constantinois, dijon-prenois, frances conroy, grocery boy, helen of troy, james purefoy, kamilaroi, kevin conroy, khalkotauroi, kolomenskoye, leo tolstoy, mackenzie foy, mafiaboy, melanochroi, mesonephroi, messenger boy, metanephroi, nickel alloy, the kid laroi, traveler's joy, turkana boy, underemploy, e-girls and e-boys, ferroalloys, mrs. brown's boys, one of the boys, radio noise, signal-to-noise, suicideboys, superalloys, trailer park boys

5 syllables:
andrey zamkovoy, delivery boy, elevator boy, my little old boy, rory mcilroy

6 syllables:
anya taylor-joy, bell uh-1 iroquois, certified lover boy, seeyouspacecowboy, 20th century boys, seshollowaterboyz

7 syllables:
royale union saint-gilloise