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.
delay delly del deil duel deal tela dele diel duly deli dell daily dooly doula dally doily dulia telia doyly telae dully dolly dilly telly dually duello dahlia doyley duelli dal dol tel dole dale tael dull teal doll dial tala diol dual teel dill dahl tele tell tola
relay belay delay lay nelly feyly felly fella eely belly mealy vealy flay allay cella tela telia waylay chela sheila flawy quelea cullay slay vela paella rely jelly seely clay selah play kelly delly newly telae telly welly chelae shelly