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