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.
aurochs arches archaise airshows archaize
aurochs curches troches soroches porches parches orchis merches marches lurches larches currachs carroches arches caroches brooches brioches brachs birches perches searches torches churches