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.
crummy crumby crummie crumb corium gremmy creamy curium grum corm cram grume cream carom crime grimy creme carrom crambe crambo gramma gramme corymb quorum caramba coremia gremmie
rummy crummy rammy brumby crumby gremmy