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.
decos decoys decks decays dekkos dogs docs dioicous dagos ducks deoxy tacos dukes degas dicks dykes docks dikes dekes dagoes degauss doggies dex dickeys dickies duckies dags daks dexy digs doux doxy dugs tegs tics togs
decos cos geckos mucous jocose coss cosy hecks coys aqueous cows gecks raucous mucosa cacaos recs locoes scows guacos segos cocos decks decoys tacos whackos chicos becks pecks jockos recks fucose ficoes fucous egos ecus fecks mucose necks locos pecs buckos kecks wrecks cogs secs cocoas sickos jucos boocoos coos dioicous wackos checks shackos