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.
rabat rabato rebato rubati rubato rebate rebait rabbit rabbet rabbity rowboat rabid rebut robot reboot rubout rebought
rabat bat tubate debate sabbat rubati rebato rebait baht bait bate batt beat boat abate abet abut habit jabot lobate niobate rabato rebate rowboat rubato sabot towboat showboat
rabbi crab crabby grab grabby drab