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.
palm palmy plum pallium plumb plume plumy pileum plummy
balm halm calm qualm malm palm realm
pal pale palea paleae pall pallia pally paly