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.
acetin acetone ascidian astony
acetin isatin destiny destain sestine satiny seton stain stein zeatin satin mestino isatine pastina postin cystein cysteine cystine sestina sustain destine distain