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.
kelts kilts keloids kilties colts klutz clots gluts cults glouts cleats clouts guilts gleets culets gaults klutzy quilts gloats cultus cloots galiots collets colitis callets glottis gullets gallets cullets galoots galettes galletas galliots galloots killdees quillets
belts melts pelts welts celts kelts delts felts gelts cleats bleats filets owlets fleets cultus jilts cults gelds maillots bullets ballots gleets holts molts gullets voltes leets ballets pleats mallets poults vaults piolets lilts elds halts blats billets silts shields shallots chalets willets collets wallets tilts dolts deltas zealots slots sleets rialtos lots salts melds millets reallots gaults galletas muletas cullets clots valets gallets malts guilts gilts milts velds blets palets colts blots lats mullets quillets toilets helots pallets allots howlets kilts flits gluts bields hilts quilts welds lits altos culets bolts alts bluets faults fillets callets rillets jolts pellets boletes violets volts boletus pilots flats moults pullets plots fields sallets relets saults slats slits sluts deletes lets tallits plats wields wilts chields sheltas yields
kelt keeled keloid kilt kiltie kilty