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.
tumulous tumulus tumulose tumbles tombolos tamals tymbals timbals tamales tameless timbales timeless tombless tombolas tambalas dumbbells tomalleys
emulous hamulous cumulous ramulous tumulous famulus fumulus hamulose hamulus cumulus limulus ramulose tumulose tumulus