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.
pretties proettes parties pirouettes purities parities parietes prates prides pyrites pirates yperites parodies prats ports parts priedieus prudes parrots proteas proteus parades periods perdues peritus pierrots protease proteose pyritous pards prods perdus purdas
pretties reties charities dirties sureties rarities proettes pirouettes parities grottoes garrottes garottes curettes hearties varieties rottes forties ferities burettes brattice barrettes ariettes parties verities purities sorties syrettes treaties shorties