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.
chicos chics chicks chicas chigoes chickees chooks chucks chokes checks chocks chegoes shicksa chuckies chugs shogs cheeks shakos sheiks shiksa shikse shooks cheques chukkas shackos shakoes sheikhs shikseh shackoes
chicos cos micks mucous quicks licks guaiacs pics picas ricks cocoas cogs jockos scows jucos buckos sicks hicks dicks fucous tacos hoicks tics ficus whackos ficoes chicas fucose boocoos coos shackos decos mucosa sickos sics locos jocose mucose mics nicks laics locoes kicks raucous picks wricks cocos guacos micas biogs cows cacaos decoys coss dioicous cosy ticks geckos wackos coys wicks bigos chicks chics yoicks
chic chica chick chickee chico check chigoe chock chuck chucky hitchhike chachka chechako