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.
crumb crumby corium corymb curium crambe crummy crambo cram corm caramba grum crummie carom cream creme crime grume carrom creamy quorum coremia gorm gram grim
crumb rum durum zoarium cerium quorum grum rumba arum aurum barium bohrium brumby ferrum brume forum jorum corium corymb crumby curium grume larum serum drum yttrium