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.
salience saliency silence salinas salines salinize soleness salons sullenness saloons solions silenus xylenes selenous selenious silliness sallowness solans solons
salience alliance valence valiance violence reliance saliency silence dalliance