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.
lychee lichee lych louche lech lich loch laich latch leech letch lichi loach leach leachy litchi lochia
fitchee lychee lichee bouchee vouchee techie mache douche hoochie rushee ache rouche boche rechew eche nitchie chew niche cache fitchew tache gauche seiche miche ruche louche fiche quiche nuchae gouache rotche touche