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.
acres acarus across agrees aggress auguries agars aggers aggros agoras agrias augurs agarose
acres nacres lucres sucres fiacres knackeries cookeries cries grees micros kerries puggries scries crus kyries rookeries aggress jaggaries jaggheries hickories ogres jaggeries cures skerries lycras eagres mucors sowcars cress puggarees auguries screws chicories chickarees waggeries tigress digress degrees decries decors daycares squires rockeries quackeries scares piggeries recarries curies scurries kauries egress ligures fakeries macros vicars quarries caress rogueries ogress scars equerries ecrus curries squares soucars quires regress agrees figures puggrees mockeries gores carries caries cars greys beggaries recurs crews queries scores buggeries cris curs cores secures cares corries gurries pugarees pugrees grues screes cicorees cors quaeres bakeries decrees cowries decuries dekares requires doggeries toggeries vagaries wiggeries chickories decares shikarees