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.
duddie dude didie duddy dautie dud duet died diet dite duad duit daddy diode dawtie dad did dit
caddie laddie cuddie widdie kiddie baddie waddie duddie die rediae hoodie roadie dude foodie dite died adieu goodie mediae diet nudie howdie gaddi didie woodie
duddy duddie dud buddy fuddy cuddie cuddy muddy rudd ruddy sudd daddy duad dude