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.
suitcase seedcase stags stacks stakes steaks sticks stocks stoics stickies staigs steeks stokes stooks
nutcase suitcase notecase patacas seedcase