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.
chill chilly chilli chili shill chile chiel cholla chally challa challah challie chola shell chela shiel cholo shall shily chyle chalah chaleh chelae sheila shelly shallow shul sial
chill hill shill ill ghyll quill billy filly fillo fille fill vill faille hila bill mouille chili jill phial rille scilla silly dill taille tuille will chiel chilli shall shiel shily pill gill hall nill gilly mille hell hili hillo hull hail villa hilly illy heil kill villi rill shell rouille sill zill dilly till while willy chile maill chilly mill yill