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.
gaddi gadi gad caddie gaud goad qadi gait gaed cadi kadi caddy gaudy gaiety cuddie kiddie goodie cad god gat cade caid gate goat good gowd gude guid qaid quad
gaddi add wadi waddie daddy roadie radio padi paddy laddie qadi kiddie kadi gadi cuddie cadi caddy caddie faddy baddy baddie radii readd sadi duddie waddy widdie