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.
hardly hardily heartily horridly hartal hurdle hurriedly hordeola hierodule hurtle
buirdly lordly hardly lairdly weirdly tardily proudly pertly rudely partly ridley rowdily tartly crudely tiredly reedily horridly readily redly curdle worriedly shortly hurriedly girdle greedily hurdle curtly serriedly portly broadly peartly broodily luridly courtly ruddily bordel aridly hardily variedly fardel torridly wordily chordal shrewdly
hard hardy hairdo haired hared harried hart hayride heard heart hearty herd hoard horde