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.
marten martin martini meridian
hearten marten shorten torten chorten parton burton grutten brighten quartan greaten ratten retene rotten written rewritten garden harden martin ratteen cortin cowritten burden partan preteen protein tartan fourteen protean warden carotene carton
mart maraud marred married mort amaretti amaretto imaret smart smartie smarty