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.
coxed coaxed coccid caucused coccidia cockiest caucussed
foxed boxed coxed poxed loxed mixed tuxedo maxed taxed coaxed sexed faxed fixed oxid nixed vexed goosed hoaxed raxed hexed dioxid exed taxied axed waxed