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.
gramma grama gramme gram gremmy caramba gourami gremmie gorm cram grum grim grume karma cream groom grimy grime korma crambe crambo creamy crummy crummie
gramma rammy brahma caramba grama gramme karma maremma diorama drama tarama trauma