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.
didact deduct dedicate dedicatee detect deticked
redact didact duct tact addict adduct edict educt viaduct mudcat outact readdict stacte deduct woodcut