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.
cadence cadency cadenza codeines codens catenas codeins codeinas cuteness guidance quittance codons cotans ketenes ketones
cadence dance denes dense dunce tenace audience bedunce voidance cadency guidance patience potence pudency riddance