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.
murr murry murre murra murrey mura mure merry myrrh morro marry morrow marrow mor mar mir marrowy mora miri mair mara mire moor miry mere mare maar more maria mbira moira moire moory morae moray
burr curr murr purr durr churr