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.
hahs has haughs haes haws hays hehs hawse huzzah heughs hos his hes hoys hiss hues hazy hies hews hoes haze hows hose hissy hoise hosey house hussy huzza
aahs ahs hahs dahs shahs yeahs as