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.
as aas ahs ais ass ays aahs asci asea assai assay
aas as teas zoeas seas ras pias mas las pas baas bas bias boas fas sheas was vas has hylas tas zas rias raias peas leas moas gas koas keas kas kaas goas chias toeas yeas