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.
spaits spats spits spates spites sopites spots spitz septs spades spouts sapotas sapotes sippets zapateos spuds speeds spodes speedos
spaits pits chapatis spits spats pates pats patsy peats pitas padis cowpats coapts opiates pipits pupates repeats sopites spates spites wapitis chappatis
spait sapid sopite spade spado spaed spat spate spied spit spite espied