Chambers has these as well as all the others ... hehe ...
Akkadian,akkas,angekkok,angekkoks
brickkiln,brickkilns
Chanukkah
dekkoed,dekkoing,dikkop,dikkops,dukkeripen
ekka,ekkas
Fokker,frikkadel,frikkadels
Habakkuk,Hanukkah,hokku,hokkus
jambokked,jambokking
lekked,lekking
Nikkei,Nikko
pakka,pondokkie,pondokkies
rokkaku
sakkos,sakkoses,Sikkim,sjambokked,sjambokking
tikka
Voortrekker,Voortrekkers
yakka,yikker,yikkered,yikkering,yikkers,yukki
er,yukkiest,yukky
... there are no foreign words in multiculturism