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.
violin villain villein violone villainy valine feline
colin violin kaolin lin loin feline liny lino linn line lien ralline elain lion byline alien jawline cauline blin lain cullion eloin mullein hyaline choline aline malign milline moline olein talion eolian pillion reline saline solan solon guyline towline aeolian gallein jillion hellion villain align villein valine bullion realign blini blain billion aloin eloign bowline cline beeline woolen kalian tolan zillion solion slain salina plain colon paulin mullion moulin million maline kaoline hyalin yeelin
viol viola ovoli vail veil vial vile vill villa villi villae voila voile vole volley evil evilly ovolo