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.
portiere porter purtier partier parterre prettier perter prater portray pearter parroter parader perdure prodder prouder prudery predry pretor
portiere fruitier chertier troutier dirtier prettier partier quartier groutier grottier grittier courtier carrotier rattier frettier retire brattier artier ruttier rootier retiree parterre heartier purtier tartier wartier shirtier