1 syllable:
boyne, broin, cloyne, coign, coin, coyne, goin, goyne, groin, groyne, hoyne, jeune, join, joyne, koine, loin, moine, moines, proin, quoin, royne, scheune, soign

2 syllables:
adjoin, alboin, aloin, altcoin, ardoin, aucoin, avoine, baudoin, beaudoin, beef loin, benjoin, benzoin, besoin, bitcoin, boudoin, bourgoin, bowdoin, burgoyne, chanoine, chaudoin, chicoine, cojoin, conjoin, des moines, disloign, dogecoin, dunboyne, eloin, enjoin, esloin, essoin, ferroin, fibroin, frinkcoin, furoin, ganoin, ganoine, gascoyne, glonoin, glonoine, gridcoin, indoin, injoin, jodoin, khoikhoin, lemoine, lemoyne, leoine, ligroin, mccoin, mcgloin, micoin, misjoin, moinmoin, namecoin, onecoin, peercoin, pork loin, primecoin, purloin, raboin, recoin, rejoin, sagoin, sainfoin, saintfoin, sanfoin, sardoin, sirloin, subjoin, surloin, titcoin, unjoin, vertcoin

3 syllables:
acyloin, ambacoin, antimoine, barbaloin, egremoin, ethotoin, filecoin, frankalmoign, haematoin, interjoin, john burgoyne, kodakcoin, litecoin, macedoine, murexoin, nataloin, phenytoin, reconjoin, stablecoin, surrejoin, talapoin, tenderloin, tretinoin, underjoin, whoppercoin

4 syllables:
assiniboine, auroracoin, battle of boyne, beef tenderloin, mephenytoin, pork tenderloin

5 syllables:
alitretinoin, babydogecoin, isotretinoin, monooctanoin

6 syllables:
history of bitcoin