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.
orator oratory oratorio order ordure
barrator curator narrator aerator deaerator gyrator creator orator hydrator greater territory prater crater krater parador pretor barrater grater moratory rotor barratry traitor retore irater rater juratory heritor toreador gyratory barretor feretory praetor mirador frater narrater sartor oratory phratry treater