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.
foreseer freezer forcer friseur frowsier farcer frizer verser farceur frizzer furzier frizzier frouzier frowzier
foreseer verser caresser creaser greaser presser dresser terser
fores foresaw foresee fares feres fires force fours frees fries froes