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.
cubby cabby cobby cub cobb cube gabby cabbie cowboy cab cob gaby goby
hubby nubby chubby bubby rubby tubby cubby knubby hobby shabby webby knobby tabby lobby dauby ribby dobby abbey bobby cobby cabby baby nobby bubba ruby gabby yabby