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.
muntin mountain mountainy maintain montane mundane monotone monotony menadione
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
manta manteau mantua maund maundy menta mentee mint minty monte mound mount