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.
flees flues fleys files feels flews fleas flies floes filles fleecy foleys fleece folles felloes flus fillies fellies fils failles feeless follies vales fails flows fuels filos fells flays fouls flaws false floss fills fulls voles fools foils foals fowls falls filose values folios voiles fillos falsie floosy follis flossy fellas volleys fallows fellows foliose folious follows floosie floozie flossie valleys fellahs vowless ghillies ghoulies viewless
allees glees pollees callees flees bailees mallees lees gelees coulees melees doolees les bales vales boulles colies boughless joyless biles fellies gallies glues bullies viewless aloes feels mailless values joles calesa lies eels hales bellies holloes miles coalless bless folles flews pules gillies piles oles rilles queleas molies rallies fillies deles boles milles seels tallies awless lues dales heelless voles toeless gleys mollies leas polies ghillies poles moles riles dewless sailless tieless soles toles dailies toyless mulleys tules wales doylies goalies mealies wheelies wellies wheels dollies wholes doolies willies woollies challies tailless chilies slues chyles shoeless teles dalles voiles soulless rouilles bailies slews lollies boules doilies coleus gullies alleys vowless hollies gales wallies belles follies plies reales lawless less felloes joules keels relies coolies hulloes selles sloes fleas lilies muhlies leis mules bowless soleus coles wyles plews clews dellies flies malleus kellies halloes keyless kayles guiles jawless ghoulies toiles ales flues jollies killies helloes soilless teels baileys haoles clues feeless files valleys cullies allies failles bialies ballies blues heels holes leys caules mealless belies hoyles mooleys hueless pleas gules kales holies peels ileus sallies pulleys dillies filles doles sales poleis haloes nellies roles volleys billies goalless keelless jellies sullies oleos galeas peles collies dallies fleys gulleys foleys rales galleys mailes floes hilloes wayless rayless whales tellies tiles muleys toolless kneels tuilles rules tulles walies tailles males sillies pileus wheelless whiles pales wiles doyleys woolies chalehs chiles tales chillies reels shales yules
flee feel file flea flew fley floe flue foley level levelly