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.
frieze frisee freeze friz furze frizz fries froze frise frees farcie furies fierce fraise frizzy foresee ferries faeries fairies pharisee furzy fires farci feres froes farce fares force fores frowzy ferias varies frouzy foresaw furioso furious veeries ferreous gharries
frieze braize breeze freeze frisee pharisee heroize prize
fare fere feria feriae fiery fire fore frae free froe fifer fiver riever rifer river