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.
radially radial radiale readily ritually radialia redial reedily ruddily retally rowdily redly ratal radula rattly ritual raddle ridley rudely retail radulae rattail ruttily ratel rattle reddle retell retile riddle ruddle rutile
radially medially tidally ritually dally dilly dually tally fatally feudally vitally ideally caudally coitally modally mutually nodally retally stilly totally
radii radio raita redia rediae roadie rad