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.
boost boast bust bast best besot busty beset beast baste boozed bossed boused bowsed basset bestow bassett beastie
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
boos bos booboos boobies bios boas booze boozy boss bossy bouse bousy bows bowse boys bozo abos bobs booboisie boobs