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.
toasty toast tasty tost taste testy tasset dost test doest dusty tacet tacit testa tawsed teased testae testee tossed toused
hasty pasty toasty yeasty vasty tasty nasty sty yeast toast gast baste last haste maist vast least waist oast lusty fusty waste boast busty piosity russety wristy zesty taste testy ghast gusty pasta chaste cast ghosty coast caste stay mayst fast east satay feast wast musty stey misty mast bast pesty roast rusty sayst dusty paste hast past beast feisty chesty
tas tawse tots todays toadies tats stoss odas etas tass tasse tassie taus taws taos tease teas toeas toes toss touse tows toys oats stoas tads tatsoi toads tods utas