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.
bipeds bipods baptise baptize bowpots
peds bipeds mopeds updos tappets speeds sippets puppets pipets pads pedes pets pods puds apods bipods cupids poppets keypads rapids lappets speedos lipids spuds moppets tippets kneepads whippets