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.
chert cherty cheroot chart cheered sheroot chariot charity chard short chord sherd shirt shirty chared chored shorty charade choroid sheered charred chirred chaired churred sheared choired shortie choreoid chorioid
chert merit shirt cherty chart whort wert derat pert peart hurt beret herd heart hart vertu vert sherd short
cherry cheerio ochry ochrea ochery sherry churr chore chiru chirre chirr chiro cheery cheero cheer char chary charry charro charr chare chorea churro ocher ochre ochreae cheshire