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.
orbier
ribbier grabbier rubier orbier shrubbier herbier ribier grubbier crabbier forebear shrubbery robbery cribber grabber drabber grubber briber rubbery bribery rubber gerbera crabber barber prober ribber drubber robber curber forbear beriberi