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.
gram grama gramme gramma cram grum grim gorm gourami grimy cream groom grume grime crambe crambo creamy gremmy caramba gremmie corm carom creme crime crumb karma korma
ram foram ihram joram cram gram marram pram ziram diram dram tram