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.
gogos gooks cogs gags cocos cooks gowks kooks cocoas guacos cookeys cookies cuckoos gox quaggas kegs
gogos logos gos coos goosy goes biogas goose goas looks bogs hooks hoggs egos goos noggs cocos nooks rugosa rugous segos zooks dagoes dogs togs chegoes chooks shooks goys bigos bogus mogs chigoes dagos togas sooks zygose rugose sagos nogs rooks bookoos biogs wogs logs shogs kooks boocoos locos gooks cuckoos cooks cogs jogs hogs fogs books yogas