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.
smalls smells sambals sawmills smiles cymbals samiels similes smileys sumless symbols cembalos seamless symbolise cymols
malls gumballs smalls tambalas lamellas miauls smells cembalos mills sawmills cymbals tamales timbals hamauls molls females emails bummalos mulls mullas remails milles mammals gimbals gimmals maills kamalas jumbals mells camails males mails hammals mauls meals sambals hamals dumbbells tamals timbales tymbals
small smell smelly smile smiley