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.
sherds shards shreds shairds shrouds sheroots chards cherts chords shirts shorts shrewdies cheroots choroids shorties chorioids
herds nerds sherds ordos bardes burds murids grids fards jerreeds fords reads breeds haeredes brads pards liards grads irids nerts hards heredes birds cords creds boards yards sards cairds urds shards prods chords chards lairds weirds wards shreds cruds treads marrieds surds hydrids breads sciurids rads rereads beards bards hybrids gourdes cards dreads hoards redos nurds hairdos rods merdes jerids jereeds redes hordes teredos verts reds fiords jerrids creeds nards gourds shairds rids farads credos nereids hurds greeds lords lards purdas reeds sarods guards sords perdus oreads girds turds reredos uredos weirdos redds words cherts curds yairds bredes yirds
sheroot sherd ushered shroud shrewd shorty shortie short shored shirty shirt shirred sheered sheared shared shard cherty chert cheroot shred shrewdie schrod usherette