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.
rubato rabato rebato rubati rabat rubout rebate rebait rowboat robot rebut rabbet rabbit rebody reboot rubbed rubied rabbity rebought
rabato rebato rubato bat rabat tubate niobate debate abate sabbat lobate rowboat rebate rebait beat baht rubati boat batt subito bate towboat bait showboat
rub rubby rube ruby grub grubby krubi drub