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.
false falsie fails valse falls foals filose valise foliose fallows flus floosie failles flossie fils fulls fools flaws flees fills feels flays flows fleys fowls foils vales vials filos floss fouls floes flews veals fells flies files fuels fleas flues vails floosy phials values fellas fleecy follis fillos flossy fleece foleys folios filles folles fellahs feeless fellows fellies fallacy valleys follies fillies floozie folious felloes follows phallus villose
valse false als hales bals lease mails fails ales miauls bales bawls falsie lyse aals pals coals gals pulse veals palliasse males close foals goals kales lose valise gales liaise halos vails heals pails villose pilose sials taels sheals shauls duals wheals weals dals wauls wales rales teals talls talas mauls quails sails pawls realise dials nalas dahls jouals sauls xylose bialys sals cauls release calls falls else balas rials kails reales zeals lalls salsa dulse hauls deals wails phials tales shales hails wawls vales galls koalas filose alas pales lase galas blase nails callose ails bialis balsa palsy shoals coalas malaise also awls baals bails balls alls clause halls jails calos malls vials gaols please meals shawls paillasse palls peals rails reals sales seals dales dialyse tails talus walls whales yawls
fail faille fall fallow feal foal