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.
mair mar mir mare mara maar miry miri mire marry mbira moire maria moira marrow moirai mor marrowy mere moor mora more mura mure murr merry moory morae moray morro murra murre murry myrrh
air fair vair hair lair mair pair deair wair chair ar