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.
burro burrow burr burry bur bro brr borrow barrow barrio buhr biro birr brow brio broo bury bura brrr bourree burgh barre berry bureau bar bra brae braw bree boor brie bora bear brew bore beer boar bray bare bier byre
burro churro morrow marrow guiro karroo curio curr harrow furry farrow furrow durr surra charro purr euro arrow hurry curry murra burry murry barrio murre murr morro gurry kouroi barrow narrow sorrow borrow burr burrow durra duro churr yarrow