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.
rosary rosery rosaria rooser rosier rouser riser razor razer raser racer racier raiser rasure rozzer reassure reissuer
rosary pessary tussar sari saury sear soar hussar caesar maiasaur quasar misery osar ossuary rosery suasory tsar usury
resaw rousseau ursa dross prosy pross prose proas crosse roes roose rose rosy rouse resay arose rows bros brose brosy eros erose cross gross pros proso prossie roars drossy ursae