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.
roost roset roast roust roosed rosette rust roseate rest wrist resat wrest reest rosed reset resit rusty reseat resite roused russet wriest wristy risotto russety
boost roost ghosty soot ghost foist boast zooty costa sooty moist moste host roust dost tost oust joist hoist joust coast coset cost lost most oast posit roast hosta post roset doest toast wost
roose arose drossy prosy pross prose gross rose rosy rouse rousseau rows roes bros broos brose brosy eros erose cross crosse pros proso prossie dross trooz