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.
dentin dentine tontine downtown tendon
muntin quintin dentin wanton dentine ponton cantina suntan sonatina pontine fontina fountain phenytoin intine canton contain quintain quintan lenten maintain mountain kinetin nandin tontine sonatine wonton
dent tent detente detent detained adenoid tenty tentie dunt deaned duende dint denude denote denned denied detonate