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.
spait spat spit spite spate sopite spot sept sputa spado spout septa spade spied spaed sapid sapota sapote sippet spotty zapateo sped spud
spait pat pit paty chapati peat uppity pita spit padi spat paid pate capita cowpat pipit pupate repaid repeat sopite pity spate spite wapiti chappati