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.
raygrass regress rakers rigors rackers recross regrows riggers rigours ruggers rigorous wreakers recarries rogueries recurs
raygrass grass crass cuirass grassy grays gross aggress agoras agrias egress jagras ogress regress digress tigress