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.
gulch culch glitch cultch guilloche goulash glitchy clach clutch galosh cloche golosh cliche klatch caleche caliche clutchy galoshe goloshe
culch gulch mulch clutch zilch clach slouch moloch milch cultch belch filch lych louche loch lich lech slouchy welch