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.
reboot robot rebut rebought rebody rubout rebato rebait rebate rowboat rebid rabat rabato rabbet rabbit rubati rubato rabbity
reboot boot seaboot bot abbot towboat boat booty bota bott bout about robot rowboat rubout sabot jabot showboat