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.
overate overrate overeat overt overed overdue override overrode overrude overdo offered
overate ferrate phorate variate verite biforate bivariate ephorate covariate levirate overeat overrate