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.
outset outsat outsit outside outstay outcity outsaid
outset fittest wadset duettist retest outsit outsat latest quietest mutest cutest coattest hottest headset photoset whitest wettest disseat featest neatest whatsit wattest tautest detest pietist phattest lutist tasset quietist test tost attest autist fattest chutist
outs outsaw outsay outsee oats oots ouds