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.
kaiaks kicks kikes kakas kakis guaiacs gawks keeks kecks kagus cacas kooks cakes cacaos quacks quakes quicks caiques cookies gawkies quaggas quokkas quickies
kaiaks kakas gigas picas backs wicks rakes macks pikas teaks fakes jakes daks guaiacs oaks rakus vigas bakes bikes quicks wracks kicks makos quacks shiksa leaks micks yikes yacks sheikhs chicks wauks tikes takas dicks sikes pikis shakes paiks auks wacks tacks sicks beaks wricks lakes saigas likes sakis knacks cakes hacks gawks kikes makes kakis ricks quakes hawks hikes hakes rakis nicks soaks lakhs jacks hakus takes picks loggias racks whacks haiks peaks hoicks sheiks micas jauks haikus mikes sakes licks sacks lacks wreaks hicks sequoias dikes tikis packs yaks shacks pikes sikas dawks taigas ticks wakes chicas shakos shikse yoicks