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.
citreous citrous citrus citrusy citers stereos stores stares stroys strews sitars strows stress stours steres ciders sitters storeys suiters stoures suitors sutures satires sautoires stars stirs cyders satyrs steers strass straws strays cedars ceders sutras stairs
vitreous citreous hydrous torous butyrous goitrous nitrous notorious odorous petrous citrous stereos