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.
ruinous ruins rins runs rains reins rinse runes ruanas rouens ranis roans wrens ranees renews rawness rennase wryness
heinous vinous ruinous nous winos tenuous sinus sanious aeneous finos venous vinos kinos linos minus nouns pianos quinoas sinuous dinos winoes chinos nos nus ins