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.
fleece fleecy flees false fleys feels flues floes files flies fleas flews falsie filles foleys filose folles veloce failles feeless fellies felloes fillies floosie floozie flossie fallacy foliose follies
flee feel file flea flew fley floe flue foley level levelly