I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
curiosity cariosity curst crista crusty querist cristae creosote crosstie grist crust crest cursed cruset corset coursed crossed cruised goriest cresset grisette queerest crosshead cuirassed karst
cariosity curiosity morosity porosity serosity torosity
curios curiosa curies curious cris curs