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.
aggro agger agar agora agree agria augur agorae augury acre
aggro grow regrow nigger muggur logger muggar agger bagger beggar kegger bigger bugger dogger dagger tugger sagger chigger rugger eggar egger jagger puggry nagger mugger lagger lugger jogger jigger gagger fogger hugger hogger digger seggar tagger saggar wagger rigger chugger