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.
skill skell skull squill squilla squillae sokol scull scall skoal sigla sickle sickly sigloi squall suckle seagull soggily squally
kill skill cheekily tackily squill kail muckily luckily leakily quakily gawkily coquille jokily cockily pockily ickily vakil aiguille quill kilo pawkily pokily skell hokily rocaille skull squilla wackily shakily