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.
tost toast toasty test dost tasty taste doest testa testy tasset testae tossed toused testee dust doughiest deist dosed dusty tacet tacit tsade tsadi
boost ghost host cost lost most post roost dost tost wost