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.
valence valance valency valiance violence valiancy vileness flense flounce fluency valines valonias villeins flouncy violins
violence valence silence lance lenes lense balance flense valance valency glance salience xylenes