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.
ferny fern ferine firn frena frown furan farina fraena wyvern foreign
ferny ern heron horny irony journey cairny carny hern kerne gurney quern lierne porny reran serin terne sharny crony wyvern fern kern earn briny barony barny barney carney erne greeny corny koruny learn hyperon reearn rerun tern tourney yearn
fer faerie faery fear feirie fere feria feriae ferry fiery