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.
intone intine intown indene indign
intone monotone panettone wanton undone downtown syntony pontoon pontine newton niton phenytoin intine intown canton condone menadione ponton monotony sonatine montane dentine panettoni tontine pentane untune pentene wonton