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.
chugger chigger chequer chukker shaggier choker chukar checker shucker chokier chukkar cheekier checkrow chakra shaker chicory shakier shicker shikker shocker
bugger lugger chugger rugger tugger hugger mugger jogger naggier wagger bigger quaggier jigger muggur agger faggier foggier toggery rigger wiggery buggier egger logger sagger soggier digger doggery tagger hogger waggery wiggier fogger fuggier chigger jaggier gagger piggery puggier buggery nagger bagger kegger muggier vuggier loggier piggier puggry jaggery lagger jiggier jagger nigger saggier dagger dogger doggier boggier leggier baggier muggar shaggier