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.
spade spode spado spate spaed spud sped spat sputa spite speed spait sapid septa siped spied spued sapota supped sopped speedo sippet speedy soaped seeped sapote sapped sipped sopite souped zapateo sept spit spot
spade pad padi paid pate epode keypad lipide kneepad pupate repaid spado spaed spate spode