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.
cream creamy cram creme crambe crambo caramba gram coremia corm crumb carom crime grama crummy corium corymb crumby curium carrom gramma gramme gremmy crummie gourami gremmie gorm grim grum
ream cream dream bream ram rem rearm dram creme gram bireme joram diorama pram diram paramo ihram cram tarama grama foram harem hareem dreamy drama praam frame marram roam arame rami proem gourami ziram creamy tram
care core craw crew cure acre ocrea ocreae recarry wreaker scree screw screwy