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.
doughty dought duty doty dotty dot tout daut duit doat dote duet doit deity ditty doody dowdy duddy tutty dautie tatouay
haughty doughty doughy bought dought
dough doughy dought doughty boughed bought duh