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.
spode spade sapote spud sped spot spied sapid spite spout spued spate spaed spado siped speed sopped sapped sipped sippet speedo souped sapota sopite seeped soaped speedy spotty supped sept spat spit
spode epode pod hypoed poet pood apod bipod capote lipide lipoid sapote spade dipody tiptoe