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.
koala kola coala gala coal koel kolo goal kale kohl cola kail calla galea coaly galah qualia goalie galeae gal col cool claw cole calo gale clay gall coil kill caul coly gaol keel call kilo cowl
coala koala ala moola tola doula sola palea nala boyla alae bola foal viola voila joual chalah chola shoal qualia holla calla gala galea olla walla tala coal zoeal goal cholla challa realia galah moolah cola mola coaly kola shoaly