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.
dabbler dibbler diablery diablerie doubler tabular doublure
babbler dibbler wabbler gabbler hobbler dabbler quibbler cobbler wobbler gobbler nobbler rabbler nibbler bubbler blear bluer abler nubblier baler feebler fabler libeler cabler knobblier bubblier nobler pebblier rubblier diablery doubler wabblier labeler wobblier