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.
couture couter coterie cuter cutter coater quatre cotter goitre cooter cottar goutier cottier cautery coder cater cadre goiter guitar gutter codder quoter catarrh cattery cattier guttery guttier quieter quitter
future couture suture auteur feature hauteur quatre mature nature outre stoure