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.
nanny ninny nan nannie naan nana gnawn nun nene neon nine nona none noon noun
fanny canny shanny nanny any whinny panne hinny ginny jenny johnny goanna bunny gunny anna wany fawny pinny rainy sonny zany tawny tunny shinney funny awny finny runny benny many annoy minny canna bonny penny ninny lawny manna punny meany sunny tannoy tinny waney wenny guanay fenny shinny
nannie nanny nan anna annoy fanny canna cannie canny manna naan nana ninny panne tannoy