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.
guilts guilds quilts gaults gullets cults gluts kilts quillets glouts gleets gloats glutes culets cultus gallets galoots kilties cullets galiots gluteus galletas galettes culottes galloots galliots galateas gallates golds glads gleds colts kelts clots glitz qualities glides clouts cleats gleeds caulds cloots glitzy gledes glades callets colitis collets glottis calottes collates killdees
hilts wilts jilts quilts lilts milts gilts kilts silts tilts guilts callets lats blets melts halts galiots lits voltes elites howlets guilds tillites volts silds gluts gilds flits velites moults bolts willets felts gallets dolts colitis maillots flats belts flites plats sheltas chalets welts toilets deltas zealots slots slats celts rialtos reallots poults piolets blats pelts allots kelts blites palets iolites molts mallets illites fillets salts mullets phyllites millets ballots halites holts cults bullets pellets malts pilots oolites cultus quillets ileitis culets lots faults helots ballets valets clots halitus gullets alts collets lets milds filets colts jolts altos rillets pelites violets mullites owlets vaults pallets cullets litas plaits builds pullets gelts galliots sallets relets saults blots slits sluts zeolites delts tallits plots gaults wallets wilds billets shallots hyalites
guild guiled guilt guilty gault gulled gullet gullied quilled quillet quilt giglet giglot guglet