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.
outsit outsat outset outcity outsaid outside outstay
outsit whatsit wetsuit fattest wettest wattest duettist retest outsat bodysuit neatest lutist quietist attest autist bedsit whitest fittest tautest featest latest test hideosity hottest catsuit coattest cutest quietest phattest mutest nodosity outset pietist detest tost chutist
outs outsaw outsay outsee oats oots ouds