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.
rebut rebought reboot rubout rebato rebait rebate robot rebid rabat rabbet rabbit rebody rubati rubato rabato rabbity rowboat
rebut debut but beaut bout bute butt about abut rubout debit debt