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.
mule muley mulley mull maul mole male mile mouille mille maile mulla miaul muhly melee mooley mallei mullah mealie mallee mollie mol mil mel mewl mola mall milo mool mill moil meal moll mail moly mell maill mealy milia molly moola
boule joule mule pule rule tule yule