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.
folious folios foliose follis flus follows follies fowls flues fools flies foals fouls foils floosy foleys folles villous fillies fellies fils ghoulies false fills fulls flews fleas falls fails flaws filos fleys fells fuels floes flows flays voles feels flees viols floss files valise flossy violas voiles floozy filose falsie fillos ghouls fellas filles values villus fallows volleys feeless fellahs flossie floosie phallus failles fellows floozie felloes vowless
bilious folious delouse polios pileous milieus gallous jealousy jealous helios villous foliose folios bullous blousy blouse lousy louse louis lieus callous lilos olios pilous zealous chylous lis