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.
picaros picaras pickers pickeers pikers packers pakoras peckers puckers pugarees piggeries puggarees pokers pugrees
picaros cars daycares sowcars scaurs scares recross necrose karoos picaras micros carrs carse cross crows macros cares acarus across agarose buckaroos buckayros vicars jackaroos kaross saguaros scars soucars sucrose decares