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.
seven savin sphene saphena savanna saphenae savannah
even seven woven devon daven riven raven oven novena maven liven leaven coven levin given heaven haven vena vein roven veena devein doven shaven