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.
drama dram diorama derma diram dream trauma tarama dreamy dorm drum tram derm dormy durum tryma dormie dayroom teraohm term trim
diorama grama tarama drama ram dream marram karma foram roam ream pram brahma caramba hermai cram arame dram hermae tram tryma diram ziram bream gramma aroma cream gram herma gourami korma neuroma praam rami prima derma ihram frame joram paramo trauma chroma