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.
crania grana crane cranny carnie curran grannie guarana guarani carn corn curn gran crown groan carny grain crony cairn garni corny croon cornu crone carney cornea grainy cairny carina cornua careen corona granny krooni carinae carrion coreign coronae greenie
crania urania purana pirana paranoia guarani guarana grana herniae garni hernia hariana varna fraena biriani ruana triennia rani