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.
haughtier hauteur hater hatter heater hootier headier hatteria hider header hitter hooter hetero hotter hetaera hetaira hoodier hetaerae hetairai heder
haughtier doughtier doughier daughter whitier tier