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.
realter realtor relater reletter relator reloader
alter falter salter realter palter halter relater saltier flatter jolter later politer guiltier coulter pelter dilater siltier clatter violater slatier fluter philter vaulter maltier floater filter elater bleater poulter realtor plater saluter slater zoolater diluter welter billeter tilter bloater gloater liter molter pleater polluter altar floatier alder milter belter bolter blatter paltry balder kilter balloter haltere latter platter kelter quilter melter miltier moulter vaultier platier plaiter colter faultier joltier jilter shelter
realty reality reallot relate relet relit rialto preallot