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.
villainess villainies villains villainous villeins vileness violins valines violones fellness fullness flanes fallowness felines fulness valance foulness valiance violence flans valence valiancy valonias
villainess jolliness chilliness wooliness delaines silliness realness oiliness mealiness malines lowliness gluiness cleanness jowliness holiness leanness hilliness villainies valines alines lioness plainness salines dailiness wiliness woolliness hyalines