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.
citrusy citrus citrous citreous citers ciders sitars suitors sitters suiters stirs stars straws steres stours strows sutras stairs cyders stress ceders stroys stares steers strews cedars satyrs strass strays stores setters stereos souters siddurs sataras seaters satires stoures storeys sutures
citrusy torus trues truss goitrous nitrous petrous citrous citrus uterus