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.
aceta acedia aced asset ascidia acid
aceta cete tacet siesta seta setae zeta facet facete faucet fiesta vesta cuesta mozetta mozzetta nicety peseta cesta deceit testa