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.
cooky cookey cook coky kooky cocky gooky cookie coco coke kook caky gook cock cakey kicky cocoa coocoo kookie cuckoo quacky cog coca cuke gogo gowk guck keck kick cake
cooky rooky nooky gooky hooky kooky hook book rocky sook pokey nook jokey cocky took look okay gooey chook chokey choky kook tokay hooka coky cookey rook gook poky oaky joky cooey hookey hokey pocky cook shook
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