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.
squads squats squids scuds scads scats scuts skats skids cycads scutes skates scatts scouts cicadas skidoos sickouts skiddoos
quads squads scads cycads scuds guids kadis kudos loquats qaids kudus cades quids eggheads facades cockades squats decades qadis nicads aggadas quods gauds cadis gads gadis cuds caids goads cicadas cads egads equids haggadas liquids mikados gudes squids diquats