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.
cocos cocoas cocks cocas cooks cacaos cookeys cookies cuckoos cogs cokes cocci gogos cacas gooks kooks caucus guacos cox coax coxa
cocos locos cos socks rocks goose ficoes zooks decoys sickos locus pocks jocks rooks tacos mucose knocks looks mocs buckos cocoas shooks shackos whackos docks focus fucous hocus geckos books jucos chocks nooks cocks cogs cuckoos gooks kooks locoes boocoos bookoos cocas fucose cosy cows guacos coys coos goos jocose dioicous hocks goosy hooks locks coss docs bocks cacaos cooks gogos sooks socas scows raucous jockos ocas decos mucosa mucous rocs logos wackos chicos nocks chooks shocks mocks yocks
coco cocoa coca cock cocky coocoo cook cookey cookie cooky acock rococo