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.
cliche caliche cloche caleche clach culch glitch cultch clutch coolish glitchy clutchy clash gulch guilloche calash klatch galoshe goloshe
caliche cliche milch guilloche glitch cloche caleche flitch filch fleche lychee louche lichi lichee lich laich zilch
laical laically cicala cicale chicle chicly