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.
doghouse doofus taphouse doughface toughs defuse tophus typhose diphase diffuse typhous devious toughies duffs doves tophs tofus dufus doffs defuze devise tophes typhus
baghouse bughouse roughhouse doghouse taphouse chophouse typhose typhous