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.
atoms atomies atomise atmas atomize adeems admass
atoms bottoms diatoms toms radomes shahdoms stems tams retems domes doms dooms doums duomos tombs items sodoms atmas stomas idioms datums litmus stums totems tomes shittims