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.
cymar simar smear samara sambar smeary summary zamarra zamarro
cymar mar chimar daymare damar smear simar sambar samara rhymer nummary mimbar mammary lumbar embar mare mara mair maar summary dammar tamari shmear