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.
eche echoey each echo etch aecia
ache louche tache seiche ruche rouche rotche niche miche mache quiche boche gouache gauche cache fiche eche douche touche