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