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.
dirl direly tirl drily drawl dural drail droll drool drill dryly drolly dourly drooly drawly derail dearly dariole hydrilla trail trawl trial trill triol troll trull truly
birl virl girl dirl tirl whirl