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.
mannan manana munnion minion
mannan nan zenana rennin gnawn manana naan nana nona annona banana eonian banian aeonian honan inane jnana cannon gunnen quinina pennon zanana tannin
manna man main mana mane mania mano many maun mawn mean meanie meany minnow minny moan