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.
spades spodes spates spuds spats spaits speeds spites speedos sapotes sippets sopites sapotas zapateos septs spits spots spouts
spades paddies padis pads pates pedes epodes keypads lapides lipides kneepads opiates pupates spates spodes dipodies
spade spado spaed spait spat spate sped spode spud