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.
datum diatom daytime diadem tatami tedium teatime
datum atma atom luteum notum satem stum diatom
data date dato datto daut dautie dawt dawtie doat fatuity dated dauted dawted doated