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.
gels gelees gills jells jellos gillies jealous jellies jealousy jails jills joles jowls
bels keels chiels tels taels dels seels els feels fuels heels gels eels mels koels kneels noels peels reels riels cels sels duels teels wheels shiels