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.
screws screes sucres scores scares scries secures scars scurries scaurs scours scarce squires sackers sucrose soucars sowcars secrecy squares suckers sucrase scarious scariose skerries cicorees skiers sakers skirrs sugars saggars saggers seekers seggars soakers saguaros
crews screws cookeries requires mockeries figures caress cowries corries caries pugrees acres queries grows hickories regress nacres cares rogueries ligures scores jaggeries kerries agrees puggrees quaeres decuries chicories decrees chickarees wiggeries cores toggeries doggeries cicorees dekares jaggaries egress buggeries daycares bakeries skerries squires fakeries scurries gurries pugarees grees ogress craws lucres piggeries jaggheries rookeries eagres aggress equerries cures cries regrows vagaries greys carries quarries kauries quires knackeries auguries puggries kyries beggaries rockeries fiacres quackeries cress scares curies curries puggarees recarries secures gores sucres squares crows decares grues scries degrees digress ogres tigress waggeries screes checkrows chickories decries shikarees
screw scree screwy sacra scar scare scarey scarry scary score scoria scoriae scry scurry sucre escrow