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.
prow pro pyro proa prao pareo pry per par pur peer pere parr puri pore pyre pray pour pier para poor pair pree prey pure prau purr pear pare peri pareu parae hyper poori puree parry perea peery perry
row vrow trow serow narrow morrow marrow grow crow harrow furrow arrow frow farrow burrow brow borrow barrow prow sorrow yarrow