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.
smells smalls samiels sawmills smiles sambals similes smileys sumless symbols seamless cymols cymbals
mells dumbbells smells smalls mullas samiels pummelos pommels lamellas kummels gumballs camels gimels sawmills mills pummels milles mewls mels meals malls pomelos pumelos molls maills mulls umbels
smell smelly small smile smiley