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.
cookie kookie cookey cook coke cooky quickie cuke cake kike gook kook coco coky cock cocky cocoa cakey kooky gooky caique coocoo cuckoo cog keg
cookie nookie kookie rookie bookie oke dickie joke poke duckie quickie bikie luckie hawkie toke hackie skiey chokey woke choke coke tekkie hickie sickie moke cookey hoke jokey hokey pokey hookey okeh kike soke yoke
cook cookie cookey cooky coo cooee cooey gook hooky kook coco kooky rooky rook hookah nooky rookie sook choke choky coke coky hooka cocky book hook bookie look cocoa kookie nook nookie coocoo hookey cock gooky bookoo took chokey chook