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.
quaky quacky quack quake quaggy caky quag cakey gawky quick quagga quokka quickie cake coky cuke gawk guck kaka kaki
quaky quay yucky shaky whacky tacky sucky pawky beaky fakey jacky cakey caky gawky quack quacky quake laky leaky lucky mucky oaky peaky ducky wacky chucky yeuky yukky
quake quaky qua quai quay aqua aquae quack quacky quag quagga quaggy quokka squaw