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.
retally ritually retail retell readily radially ratal redly retool retile rudely rattly ritual redial rattail reedily ruttily rotl ratel radial radula reddle ridley radiale rowdily ruddily
tally vitally fatally totally coitally retally tall tidally ideally stall modally feudally mutually medially telly radially dally ritually caudally stilly nodally dually