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.
grum grume gram gorm grim grime crumb grimy grama groom gramma corium gremmy curium crumby gramme crummy quorum crummie gremmie gourami corm cram carom cream creme crime karma korma
rum arum aurum ferrum forum jorum grum quorum larum serum drum durum