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.
chicas chics chicks chicos chickees checks chocks chucks shicksa chukkas chigoes showcase chuckies chugs shags chokes chooks shakes shakos sheiks shiksa shikse cheeks chegoes cheques shakoes sheikhs shikseh
micas chicas picas chics cacas pics cays hoicks cocas cocoas guaiacs kaiaks gigas kicks chicks yoicks cacaos case ricks cycas sequoias sics socas dicks ticks wicks laics loggias caws picks casa quicks licks macaws vigas micks nicks ocas hicks saigas wricks pikas sicks sikas decays taigas tics pacas ficus mics chicos showcase yucas
chic chica chick chickee chico check chigoe chock chuck chucky hitchhike chachka chechako