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.
spaded spatted speeded spudded spited septate sopited spitted spotted spouted septet sapidity septette
spaded padded pated podded opiated pupated repeated speeded spudded
spade spado spaed spait spat spate sped spode spud